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MLA

James, Frances C. "Geographic Size Variation In Birds and Its Relationship to Climate." Ecology, v. 51,.3 pp. 365-390. doi: 10.2307/1935374

APA

James, F. C. (1970). Geographic Size Variation in Birds and Its Relationship to Climate. Ecology, 51, 365-390. doi: 10.2307/1935374

Chicago

James, Frances C. "Geographic Size Variation in Birds and Its Relationship to Climate" Ecology 51, no. 3 (1970): 365-390. doi: 10.2307/1935374