Cita APA (7a ed.)

Beard, C. A. (1961). The presidents in american history. Julian Messner.

Cita Chicago Style (17a ed.)

Beard, Charles A. The Presidents in American History. Nueva York: Julian Messner, 1961.

Cita MLA (9a ed.)

Beard, Charles A. The Presidents in American History. Julian Messner, 1961.