APA (7th ed.) Citation

Snyder, L. H. (1940). The principles of heredity (2d ed.). D. C. Heath and company.

Chicago Style (17th ed.) Citation

Snyder, Laurence Hasbrouck. The Principles of Heredity. 2d ed. Boston, New York [etc.]: D. C. Heath and company, 1940.

MLA (9th ed.) Citation

Snyder, Laurence Hasbrouck. The Principles of Heredity. 2d ed. D. C. Heath and company, 1940.