Cita APA (7a ed.)
Beard, C. A., & Beard, M. R. (1927). THE RISE OF AMERICAN CIVILIZATION.
Cita estilo Chicago (17a ed.)
Beard, Charles A., y Mary R. Beard. THE RISE OF AMERICAN CIVILIZATION. 1927.
Cita MLA (9a ed.)
Beard, Charles A., y Mary R. Beard. THE RISE OF AMERICAN CIVILIZATION. 1927.
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