APA (7th ed.) Citation

Beard, C. A., & Beard, M. R. (1941). America in midpassage. Macmillan.

Chicago Style (17th ed.) Citation

Beard, Charles Austin, and Mary Ritter Beard. America in Midpassage. New York: Macmillan, 1941.

MLA (9th ed.) Citation

Beard, Charles Austin, and Mary Ritter Beard. America in Midpassage. Macmillan, 1941.