Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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