APA (7th ed.) Citation

United States. Department of Agriculture. (1930). American medicinal plants of commercial importance. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. American Medicinal Plants of Commercial Importance. [Washington]: GPO, 1930.

MLA (9th ed.) Citation

United States. Department of Agriculture. American Medicinal Plants of Commercial Importance. GPO, 1930.

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