Cita APA (7a ed.)

Ward, B. H., & Commager, H. S. (1956). Pictorial history of the world. Year.

Cita Chicago Style (17a ed.)

Ward, Baldwin H., y Henry Steele Commager. Pictorial History of the World. Wilton (Connecticut): Year, 1956.

Cita MLA (9a ed.)

Ward, Baldwin H., y Henry Steele Commager. Pictorial History of the World. Year, 1956.