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.”