APA (7th ed.) Citation

Thayer, W. R. (1920). The art of biography. Scribner's Sons.

Chicago Style (17th ed.) Citation

Thayer, William Roscoe. The Art of Biography. New York: Scribner's Sons, 1920.

MLA (9th ed.) Citation

Thayer, William Roscoe. The Art of Biography. Scribner's Sons, 1920.