Beard, C. A., & Beard, M. R. (1930). The rise of American civilization (One volume ed.). The Macmillan Company.
Chicago Style (17th ed.) CitationBeard, Charles A., i Mary Ritter Beard. The Rise of American Civilization. One volume ed. New York: The Macmillan Company, 1930.
Cita MLABeard, Charles A., i Mary Ritter Beard. The Rise of American Civilization. One volume ed. The Macmillan Company, 1930.
Atenció: Aquestes cites poden no estar 100% correctes.