Tyler, V. E., Brady, L. R., & Robbers, J. E. (1988). Pharmacognosy (9th ed.). Lee & Febiger.
Lua i Stíl Chicago (17ú heag.)Tyler, Varro E., Lynn R. Brady, agus James E. Robbers. Pharmacognosy. 9th ed. Philadelphia: Lee & Febiger, 1988.
Lua MLA (8ú heag.)Tyler, Varro E., et al. Pharmacognosy. 9th ed. Lee & Febiger, 1988.
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