Alan, Thanks for your reply and support. I have found some diferences (I’m still search for more) APA.   -> Harvard Citation: (Author, year) -> (Author year) (No comma) Bibliography: APA: Preston, N. (2014). Understanding ethics (4th ed.). The Federation Press. HARVARD: Preston, N 2014, Understanding ethics, 4th edn, The Federation Press, Annandale, N.S.W. (No parenthesis) APA: “Bolman, L. G., & Deal, T. E. (2017). Reframing organizations: Artistry, choice, and leadership. John Wiley & Sons.” Harvard: “Bolman, L.G. and Deal, T.E., 2017. Reframing organizations: Artistry, choice, and leadership. John Wiley & Sons.” Jorge Magalhães