Cita APA

Beard, C. A., & Beard, M. (1948). History fo the United States: Study in American civilization.

Chicago Edition Citation

Beard, Charles A., i Mary Beard. History Fo the United States: Study in American Civilization. 1948.

Cita MLA

Beard, Charles A., i Mary Beard. History Fo the United States: Study in American Civilization. 1948.

Atenció: Aquestes cites poden no estar 100% correctes.