Cita APA (7a ed.)

Gathercoal, E. N., Wirth, E. H., & Kraemer, H. (1936). Pharmacognosy. Lea & Febiger.

Cita Chicago Style (17a ed.)

Gathercoal, Edmund Norris, Elmer Hauser Wirth, y Henry Kraemer. Pharmacognosy. Philadelphia: Lea & Febiger, 1936.

Cita MLA (8a ed.)

Gathercoal, Edmund Norris, et al. Pharmacognosy. Lea & Febiger, 1936.