Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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