APA (7th ed.) Citation

Trease, G. E. (1949). A textbook of pharmacognosy (5th ed.). Williams and Wilkins Co..

Chicago Style (17th ed.) Citation

Trease, George Edward. A Textbook of Pharmacognosy. 5th ed. Baltimore: Williams and Wilkins Co., 1949.

MLA (9th ed.) Citation

Trease, George Edward. A Textbook of Pharmacognosy. 5th ed. Williams and Wilkins Co., 1949.