APA (7th ed.) Citation

Smithsonian Institution. (1917). Systematic studies of American plants. GPO.

Chicago Style (17th ed.) Citation

Smithsonian Institution. Systematic Studies of American Plants. [Washington]: GPO, 1917.

MLA (9th ed.) Citation

Smithsonian Institution. Systematic Studies of American Plants. GPO, 1917.

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