Evans, W. C., Trease, G. E., & Evans, D. (2002). Trease and Evans' pharmacognosy (15th ed.). WB Saunders ; Elsevier.

Evans, William Charles, George Edward Trease, and Daphne Evans. Trease and Evans' Pharmacognosy. 15th ed. Edinburgh ; New York : New Delhi: WB Saunders ; Elsevier, 2002.

Evans, William Charles, et al. Trease and Evans' Pharmacognosy. 15th ed. WB Saunders ; Elsevier, 2002.