APA (7th ed.) Citation

Simpson, M. E. (1918). Supervised study in American history. Macmillan.

Chicago Style (17th ed.) Citation

Simpson, Mabel Elizabeth. Supervised Study in American History. New York: Macmillan, 1918.

MLA (9th ed.) Citation

Simpson, Mabel Elizabeth. Supervised Study in American History. Macmillan, 1918.