Knowlton, F. H., Ridgway, R., & Lucas, F. A. (1909). Birds of the world: A popular account. Holt.
Chicago Style (17th ed.) CitationKnowlton, Frank Hall, Robert Ridgway, and Frederic A. Lucas. Birds of the World: A Popular Account. New York: Holt, 1909.
MLA (9th ed.) CitationKnowlton, Frank Hall, et al. Birds of the World: A Popular Account. Holt, 1909.
Warning: These citations may not always be 100% accurate.