APA (7th ed.) Citation

Smithsonian Institution. (1929). Mammoths and mastodons. GPO.

Chicago Style (17th ed.) Citation

Smithsonian Institution. Mammoths and Mastodons. [Washington]: GPO, 1929.

MLA (9th ed.) Citation

Smithsonian Institution. Mammoths and Mastodons. GPO, 1929.

Warning: These citations may not always be 100% accurate.