APA (7th ed.) Zitazioa

Pfiffner, J. P. (2004). The character factor: How we judge America's presidents. Texas A & M University Press.

Chicago Style (17th ed.) Zitazioa

Pfiffner, James P. The Character Factor: How We Judge America's Presidents. College Station, Tex.: Texas A & M University Press, 2004.

MLA (9th ed.) Zitazioa

Pfiffner, James P. The Character Factor: How We Judge America's Presidents. Texas A & M University Press, 2004.