Παραπομπή APA

Evans, W. C. (1989). Trease and evans pharmacognosy (13.).

Παραπομπή Chicago Style

Evans, William Charles. Trease and Evans Pharmacognosy. 13. English Language Book Society, England, 1989.

Παραπομπή MLA

Evans, William Charles. Trease and Evans Pharmacognosy. 13. 1989.