Northington, D. K., Schneider, E. L. 1., & Scheirer, D. C. (1996). The botanical world (2nd ed.). Dubuque, IA: Wm. C. Brown Publishers.
Čikaški stil citiranjaNorthington, David K., Edward L. 1947- Schneider, i Daniel C. Scheirer. The Botanical World. 2nd ed. Dubuque, IA: Wm. C. Brown Publishers, 1996.
MLA način citiranjaNorthington, David K., Edward L. 1947- Schneider, i Daniel C. Scheirer. The Botanical World. 2nd ed. Dubuque, IA: Wm. C. Brown Publishers, 1996.
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