Cita APA (7th ed.)

Beard, C. A., & Beard, M. R. (1933). The rise of american civilization. Macmillan.

Cita Chicago (17th ed.)

Beard, Charles A., i Mary R. Beard. The Rise of American Civilization. Nueva York: Macmillan, 1933.

Cita MLA (9th ed.)

Beard, Charles A., i Mary R. Beard. The Rise of American Civilization. Macmillan, 1933.