APA (7th ed.) Citation

Smithsonian Institution. (1939). Embryology of fleas. [s.n.].

Chicago Style (17th ed.) Citation

Smithsonian Institution. Embryology of Fleas. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

Smithsonian Institution. Embryology of Fleas. [s.n.], 1939.

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