APA (7th ed.) Citation

Clements, F. E., & Shelford, V. E. (1939). Bio-ecology. Wiley.

Chicago Style (17th ed.) Citation

Clements, Frederic Edward, and Victor Ernest Shelford. Bio-ecology. New York: Wiley, 1939.

MLA (9th ed.) Citation

Clements, Frederic Edward, and Victor Ernest Shelford. Bio-ecology. Wiley, 1939.