APA (7th ed.) Citation

Thayer, W. R. (1919). Theodore Roosevelt: An intimate biography. Grosset.

Chicago Style (17th ed.) Citation

Thayer, William Roscoe. Theodore Roosevelt: An Intimate Biography. New York: Grosset, 1919.

MLA (9th ed.) Citation

Thayer, William Roscoe. Theodore Roosevelt: An Intimate Biography. Grosset, 1919.