Pfiffner, J. P. (2004). The character factor: How we judge America's presidents. Texas A & M University Press.
Chicagoスタイル(17版)引用形式Pfiffner, James P. The Character Factor: How We Judge America's Presidents. College Station, Tex.: Texas A & M University Press, 2004.
MLA(9版)引用形式Pfiffner, James P. The Character Factor: How We Judge America's Presidents. Texas A & M University Press, 2004.
警告: この引用は必ずしも正確ではありません.