Pfiffner, J. P. (2004). The character factor: How we judge America's presidents. Texas A & M University Press.
Chicago Style (17th ed.) CitationPfiffner, James P. The Character Factor: How We Judge America's Presidents. College Station, Tex.: Texas A & M University Press, 2004.
MLA引文Pfiffner, James P. The Character Factor: How We Judge America's Presidents. Texas A & M University Press, 2004.
警告：這些引文格式不一定是100％准確.