Cita APA (7th ed.)

Commager, H. S. (1950). Pictorial history of the world. Picture History Book.

Cita Chicago (17th ed.)

Commager, Henry Steele. Pictorial History of the World. New York: Picture History Book, 1950.

Cita MLA (9th ed.)

Commager, Henry Steele. Pictorial History of the World. Picture History Book, 1950.