Citazione Stile APA (7a Edizione)

Ryan, H. R. (1995). U.S. presidents as orators: A bio-critical sourcebook. Greenwood Press.

Citazione stile Chigago Style (17a edizione)

Ryan, Halford Ross. U.S. Presidents as Orators: A Bio-critical Sourcebook. Westport, Conn: Greenwood Press, 1995.

Citatione MLA (9a ed.)

Ryan, Halford Ross. U.S. Presidents as Orators: A Bio-critical Sourcebook. Greenwood Press, 1995.