APA (7th ed.) Citation

Smithsonian Institution. (1938). Evolution of the Annelida, Onychophora, and Arthropoda. [s.n.].

Chicago Style (17th ed.) Citation

Smithsonian Institution. Evolution of the Annelida, Onychophora, and Arthropoda. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

Smithsonian Institution. Evolution of the Annelida, Onychophora, and Arthropoda. [s.n.], 1938.

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