Cita APA

Beard, C. A. 1., & Beard, M. R. 1. (1946). History of the United States: A study in American civilization. New York, New York: Macmillan.

Citación estilo Chicago

Beard, Charles Austin 1874-1948, y Mary Ritter 1876-1958 Beard. History of the United States: A Study in American Civilization. New York, New York: Macmillan, 1946.

Cita MLA

Beard, Charles Austin 1874-1948, y Mary Ritter 1876-1958 Beard. History of the United States: A Study in American Civilization. New York, New York: Macmillan, 1946.