APA (7th ed.) Citation

Gathercoal, E. N., & Wirth, E. H. (1947). Pharmacognosy (2nd ed.). Lea & Febiger.

Chicago Style (17th ed.) Citation

Gathercoal, Edmund N., and Elmer H. Wirth. Pharmacognosy. 2nd ed. Philadelphia: Lea & Febiger, 1947.

MLA (9th ed.) Citation

Gathercoal, Edmund N., and Elmer H. Wirth. Pharmacognosy. 2nd ed. Lea & Febiger, 1947.

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