APA (7th ed.) Citation

Krochmal, A., & Krochmal, C. (1973). A guide to the medicinal plants of the United States. Quadrangle.

Chicago Style (17th ed.) Citation

Krochmal, Arnold, and Connie Krochmal. A Guide to the Medicinal Plants of the United States. New York: Quadrangle, 1973.

MLA (9th ed.) Citation

Krochmal, Arnold, and Connie Krochmal. A Guide to the Medicinal Plants of the United States. Quadrangle, 1973.