Cita APA (7th ed.)

Tyler, Brady, & Robbers. (1981). Pharmacognosy (8th ed.). Lea & Febiger.

Cita Chicago (17th ed.)

Tyler, Brady, i Robbers. Pharmacognosy. 8th ed. Philadelphia: Lea & Febiger, 1981.

Cita MLA (9th ed.)

Tyler, et al. Pharmacognosy. 8th ed. Lea & Febiger, 1981.