APA (7th ed.) Zitazioa

Pious, R. M. (1979). The american presidency. Basic Books.

Chicago Style (17th ed.) Zitazioa

Pious, Richard M. The American Presidency. Nueva York: Basic Books, 1979.

MLA (9th ed.) Zitazioa

Pious, Richard M. The American Presidency. Basic Books, 1979.