Cita APA

Beard, C. A., & Beard, M. R. (1944). A basic history of the United States. New York: Doubleday, Doran & Company.

Citación estilo Chicago

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

Cita MLA

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