APA (7th ed.) Citation

Walls, G. L. (1942). The vertebrate eye and its adaptive radiation. Hafner Pub. Co..

Chicago Style (17th ed.) Citation

Walls, Gordon L. The Vertebrate Eye and Its Adaptive Radiation. New York: Hafner Pub. Co., 1942.

MLA (9th ed.) Citation

Walls, Gordon L. The Vertebrate Eye and Its Adaptive Radiation. Hafner Pub. Co., 1942.