APA (7th ed.) Citation

Commager, H. S. (1966). The study of history. C.E. Merrill Books.

Chicago Style (17th ed.) Citation

Commager, Henry Steele. The Study of History. Columbus, Ohio: C.E. Merrill Books, 1966.

MLA (9th ed.) Citation

Commager, Henry Steele. The Study of History. C.E. Merrill Books, 1966.