APA引文

Beard, C. A., & Bagley, W. C. (1946). A first book in American history (Rev. ed.). Macmillan Co..

Chicago Style (17th ed.) Citation

Beard, Charles A., and William C. Bagley. A First Book in American History. Rev. ed. New York: Macmillan Co., 1946.

MLA引文

Beard, Charles A., and William C. Bagley. A First Book in American History. Rev. ed. Macmillan Co., 1946.