Cita APA (7a ed.)

Beard, C. A. 1., & Beard, M. R. (1931). The rise of american civilization. Macmillan and Co..

Cita Chicago Style (17a ed.)

Beard, Charles Austin 1874, y M. R. Beard. The Rise of American Civilization. New York: Macmillan and Co., 1931.

Cita MLA (9a ed.)

Beard, Charles Austin 1874, y M. R. Beard. The Rise of American Civilization. Macmillan and Co., 1931.