APA-referens

E Varro, E Varro Tyler, R Lynn, & R Lynn Brady. (1976). Pharmacognosy. Lea & Febiger.

Chicago-stil citat

E Varro, E Varro Tyler, R Lynn, och R Lynn Brady. Pharmacognosy. Lea & Febiger, 1976.

MLA-referens

E Varro, et al. Pharmacognosy. Lea & Febiger, 1976.