Cita APA (7a ed.)

Beard, C. A., & Beard, M. R. (1944). A basic history of the United States (1a.ed.). Doubleday, Doran & Company.

Cita Chicago Style (17a ed.)

Beard, Charles A., y Mary R. Beard. A Basic History of the United States. 1a.ed. New York: Doubleday, Doran & Company, 1944.

Cita MLA (8a ed.)

Beard, Charles A., y Mary R. Beard. A Basic History of the United States. 1a.ed. Doubleday, Doran & Company, 1944.