APA استشهاد

Grob, G. N., & Billias, G. A. (1967). Interpretations of American history: Patterns and perspectives. Free Press.

استشهاد بنمط شيكاغو

Grob, Gerald N., و George A. Billias. Interpretations of American History: Patterns and Perspectives. New York: Free Press, 1967.

MLA استشهاد

Grob, Gerald N., و George A. Billias. Interpretations of American History: Patterns and Perspectives. Free Press, 1967.