APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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