by default, the apa style will italicize this instead.

i tried modifying the bibl-apa.tex to contain the following but to no  
avail.

\unprotect

\setupcite
        [author,year]
        [\c!andtext={ and },
         \c!otherstext={ et al.},
         \c!pubsep={, },
         \c!lastpubsep={ and },
         \c!compress=\v!no,
         \c!inbetween={ },
         \c!left={(},
         \c!right={)}]

\setupcite
        [authoryear]
        [\c!andtext={ and },
         \c!otherstext={ et al.},
         \c!pubsep={, },
         \c!lastpubsep={ and },
         \c!compress=\v!yes,
         \c!inbetween={ },
         \c!left={(},
         \c!right={)}]

\setupcite
        [authoryears]
        [\c!andtext={ and },
         \c!otherstext={ et al.},
         \c!pubsep={, },
         \c!lastpubsep={ and },
         \c!compress=\v!yes,
         \c!inbetween={, },
         \c!left={(},
         \c!right={)}]

\setupcite
        [key,serial,authornum,page,short,type,doi,url]
        [\c!andtext={ and },
         \c!otherstext={ et al.},
         \c!pubsep={, },
         \c!lastpubsep={ and },
         \c!compress=\v!no,
         \c!inbetween={ },
         \c!left={[},
         \c!right={]}]

\setupcite
        [num]
        [\c!andtext={ and },
         \c!otherstext={ et al.},
         \c!pubsep={, },
         \c!lastpubsep={ and },
         \c!compress=\v!yes,
         \c!inbetween={--},
         \c!left={[},
         \c!right={]}]


\setuppublications[%
     \c!sorttype=bbl,
     \c!criterium=cite,
     \c!refcommand=authoryears,
     \c!numbering=\v!no,
     \c!autohang=\v!no]

\setuppublicationlist
    [\c!width=24pt,
     \c!artauthor=\invertedshortauthor,
     \c!editor=\invertedshortauthor,
     \c!author=\invertedshortauthor,
     \c!namesep={, },
     \c!lastnamesep={ and },
     \c!finalnamesep={ and },
     \c!firstnamesep={, },
     \c!juniorsep={ },
     \c!vonsep={ },
     \c!surnamesep={, },
     \c!authoretallimit=6,
     \c!editoretallimit=6,
     \c!artauthoretallimit=6,
     \c!authoretaldisplay=6,
     \c!editoretaldisplay=6,
     \c!artauthoretaldisplay=6,
     \c!authoretaltext={ et al.},
     \c!editoretaltext={ et al.},
     \c!artauthoretaltext={ et al.},
]

\def\maybeyear#1{#1}

\def\etalchar#1{#1}

%D \macros{insertchapter,insertpublisher}

%D Some shortcuts.

% ((#1(type\ |)chapter#2)|#3)

\def\insertchap#1#2#3%
   {\insertchapter
     {#1\insertbibtype{}{\ }{chapter\ }}{#2}%
     {#3}}

% #1city, country: pubname#2
% #1country: pubname#2
% #1pubname#2
% #1city, country#2
% #3

\def\insertpublisher#1#2#3%
    {\insertpubname
        {\insertcity
             {#1}
             {\insertcountry{, }{}{}: }%
             {#1\insertcountry{}{: }{}}}%
        {#2}%
        {\insertcity
             {#1}
             {\insertcountry{, }{}{#2}}%
             {\insertcountry{#1}{#2}{#3}}}%
     }

\def\insertorg#1#2#3%
    {\insertorganization
        {\insertcity
             {#1}
             {\insertcountry{, }{}{#2}: }%
             {\insertcountry{}{: }{#2}}}%
        {}%
        {\insertcity
             {#1}
             {\insertcountry{, }{}{#2}}%
             {\insertcountry{}{#2}{#3}}}%
     }



\setuppublicationlayout[article]{%
    \insertartauthors{}{ }{\insertthekey{}{ }{}}%
    \insertpubyear{(}{). }{\unskip.}%
    \insertarttitle{\bgroup }{\egroup. }{}%
    \insertjournal{\bgroup }{\egroup}
     {\insertcrossref{In }{}{}}%
    \insertvolume
     {\bgroup , }
     {\egroup\insertissue{\/(}{)}{}\insertpages{, }{.}{.}}
     {\insertpages{, pp. }{.}{.}}%
    \insertnote{ }{.}{}%
    \insertcomment{}{.}{}%
}

\newif\ifeditedbook
\setuppublicationlayout[book]{%
    \insertauthors{}{ }{\inserteditors{}{, editor%
                          \ifnum\getvalue{editor@num}> 1 s\fi
                              \ \global\editedbooktrue
                      }{\insertthekey{}{. }{}}}%
    \insertpubyear{(}{). }{\unskip.}%
    \inserttitle
         {\bgroup }%
         {\/\egroup
          \ifeditedbook
            \global\editedbookfalse
            \insertvolume
                 { Number~}%
                 {\insertseries
                     { in~\bgroup}%
                     {\egroup. }%
                     {\insertcrossref{ in~}{}{. }}}%
                 {\insertseries{ }{.}{.}}%
         \else
        \insertcrossref
         {\insertchap{, }{}{}%
          \insertpages{, pages }{. }{. }%
          \insertvolume{Volume~}{ of~}{}%
          }%
         {}%
         {\insertvolume
                    {, volume~}%
                    {\insertseries
                       { of~\bgroup}%
                       {\egroup}
                       {}}
                    {}%
                    \insertchap{, }{}{}%
                    \insertpages{, pages }{.}{.}%
                 }%
         \fi}%
         {}%
    \insertedition{ }{ edition}{}%
    \insertpublisher{ }{.}{.}%
    \insertpages{ }{p. }{ }%
    \insertnote{}{.}{}%
}

\setuppublicationlayout[inbook]{%
    \insertauthors{}{ }{\inserteditors{}{, editor%
                          \ifnum\getvalue{editor@num}> 1 s\fi
                              \ \global\editedbooktrue
                      }{\insertthekey{}{. }{}}}%
    \insertpubyear{(}{). }{\unskip.}%
    \inserttitle
      {\bgroup }%
      {\/\egroup
       \ifeditedbook
          \global\editedbookfalse
          \insertvolume
            { number~}%
            {\insertseries
               { in~\bgroup}%
               {\egroup. }%
               {\insertcrossref{ in~}{}{.}}}%
            {\insertseries{ }{.}{}}%
       \else
         \insertcrossref
           {\insertchap{, }{}{}%
            \insertpages{, pages }{. }{. }%
            \insertvolume{Volume~}{ of~}{}%
            }%
           {}%
           {\insertvolume
               {, volume~}%
               {\insertseries
                  { of~\bgroup}%
                  {\egroup}
                  {}}
               {}%
            \insertchap{, }{}{}%
            \insertpages{, pages }{.}{}%
            }%
         \fi}%
      { }%
    \insertedition{ }{ edition.}{}%
    \insertpublisher{ }{.}{.}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[booklet]{%
    \insertauthors{}{ }{\insertthekey{}{. }{}}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\egroup \insertseries{ (}{)}{}. }{}%
    \insertedition{ }{ edition.}{}%
    \insertpublisher{ }{.}{.}%
    \insertpages{}{p. }{}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[manual]{%
    \insertauthors{}{ }{\insertthekey{}{. }{}}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\/\egroup \insertseries{ (}{)}{}. }{}%
    \insertedition{ }{ edition.}{}%
    \insertorg{ }{.}{.}%
    \insertpages{}{p. }{}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[incollection]{%
    \insertartauthors{}{ }{\insertthekey{}{. }{}}%
    \insertpubyear{(}{). }{}%
    \insertarttitle{\bgroup }{\egroup. }{}%
    \inserttitle
     {In \inserteditors{}%
         {, editor\ifnum\getvalue{editor@num}> 1 s\fi, }%
         {}%
     \bgroup}%
     {\egroup
          \insertseries
               {\insertvolume{, number }{~in }{ }}%
               {}%
               {}%
          \insertchap{\unskip, }{ }{ }%
          \insertpages{\unskip, pages~}{. }{\unskip. }%
           \insertedition{ }{ edition}{}%
           \insertpublisher{ }{.}{.}%
         }%
         {In \insertcrossref{}{}{}%
          \insertchap{\unskip, }{ }{ }%
          \insertpages{\unskip, pages~}{. }{\unskip. }%
         }%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[inproceedings]{%
    \insertauthors{}{ }{}%
    \insertpubyear{(}{). }{}%
    \insertarttitle{\bgroup }{\egroup. }{}%%
    \inserttitle
     {In \inserteditors{}%
         {, editor\ifnum\getvalue{editor@num}> 1 s\fi, }%
         {}%
     \bgroup}%
     {\egroup
          \insertseries
               {\insertvolume{, number }{~in }{ }}%
               {}%
               {}%
          \insertchap{\unskip, }{ }{ }%
          \insertpages{, pages~}{}{}%
          \insertorg{. }{.}{.}%
         }%
         {In \insertcrossref{}{}{}%
          \insertchap{\unskip, }{ }{ }%
          \insertpages{\unskip, pages~}{. }{\unskip. }%
         }%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[proceedings]{%
    \inserteditors{}{, editor%
                          \ifnum\getvalue{editor@num}> 1 s\fi
                              \ \global\editedbooktrue
                      }{\insertthekey{}{ }{}}%
    \insertpubyear{(}{). }{}%
    \inserttitle
     {\bgroup}%
     {\egroup
      \insertseries
         {\insertvolume{, number }{~in }{ }}%
         {}%
         {}%
      \insertchap{\unskip, }{ }{ }%
      \insertpages{, pages~}{}{}%
      \insertorg{. }{.}{.}%
     }%
     {}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[mastersthesis]{%
    \insertauthors{}{ }{}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\egroup \insertseries{ (}{)}{}. }{}%
    \insertbibtype{}{, }{Master's thesis, }%
    \insertpublisher{ }{.}{.}%
    \insertpages{ }{p. }{}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[phdthesis]{%
    \insertauthors{}{ }{}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\egroup \insertseries{ (}{)}{}. }{}%
    \insertbibtype{}{, }{PhD thesis,}%
    \insertpublisher{ }{.}{.}%
    \insertpages{ }{ p. }{}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[misc]{%
    \insertauthors{}{ }{\insertthekey{}{. }{}}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\egroup \insertseries{ (}{)}. }{}%
    \insertpublisher{ }{.}{.}%
    \insertpages{ }{p. }{}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[techreport]{%
    \insertauthors{}{ }{}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\egroup \insertseries{ (}{)}{}. }{}%
    \insertbibtype{}{\insertvolume{ }{, }{, }}{Technical Report}%
    \insertpublisher{ }{.}{.}%
    \insertpages{ }{p. }{}%
    \insertnote{ }{.}{}%
}

\setuppublicationlayout[unpublished]{%
    \insertauthors{}{ }{}%
    \insertpubyear{(}{). }{}%
    \inserttitle{\bgroup }{\egroup \insertseries{ (}{)}{}. }{}%
%   \insertpublisher{ }{.}{.}%
    \insertpages{ }{p. }{}%
    \insertbibtype{(}{)}{}%
    \insertnote{ }{.}{}%
}

\protect

how you can help me with this. :-) thanks so much.

joel mendoza