Enger, E. D. (1997). Concepts in biology. Dubuque, Iowa: Wm. C. Brown Publishers.
शिकागो स्टाइल उद्धरणEnger, Eldon D. Concepts in Biology. Dubuque, Iowa: Wm. C. Brown Publishers, 1997.
एमएलए उद्धरणEnger, Eldon D. Concepts in Biology. Dubuque, Iowa: Wm. C. Brown Publishers, 1997.
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