APA (7th ed.) Citation

United States National Museum. (1944). Taxonomic studies of tropical American plants. [s.n.].

Chicago Style (17th ed.) Citation

United States National Museum. Taxonomic Studies of Tropical American Plants. [Washington]: [s.n.], 1944.

MLA (9th ed.) Citation

United States National Museum. Taxonomic Studies of Tropical American Plants. [s.n.], 1944.

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