APA

Knowlton F. H., Ridgway R. & Lucas F. A. (1909). Birds of the world. New York: Holt.

Chicago

Knowlton Frank Hall, Ridgway Robert and Lucas Frederic A. 1909. Birds of the world. New York: Holt.

Harvard

Knowlton F. H., Ridgway R. and Lucas F. A. (1909). Birds of the world. New York: Holt.

MLA

Knowlton Frank Hall, Ridgway Robert and Lucas Frederic A. Birds of the world. New York: Holt. 1909.