Cita APA (7a ed.)

Van Loon, H. W. (1939). The story of mankind. Pocket books.

Cita Chicago Style (17a ed.)

Van Loon, Hendrik Willem. The Story of Mankind. New York: Pocket books, 1939.

Cita MLA (8a ed.)

Van Loon, Hendrik Willem. The Story of Mankind. Pocket books, 1939.