APA (7th ed.) Citation

Smithsonian Institution. (1932). Butterflies of D.C. and vicinity. GPO.

Chicago Style (17th ed.) Citation

Smithsonian Institution. Butterflies of D.C. and Vicinity. [Washington]: GPO, 1932.

MLA (9th ed.) Citation

Smithsonian Institution. Butterflies of D.C. and Vicinity. GPO, 1932.

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