Cita APA (7a ed.)

Emlen, J. (1973). ECOLOGY: An evolutionary approach (1st edition.). Addison-Wesley.

Cita Chicago Style (17a ed.)

Emlen, J.M. ECOLOGY: An Evolutionary Approach. 1st edition. Massachusetts: Addison-Wesley, 1973.

Cita MLA (8a ed.)

Emlen, J.M. ECOLOGY: An Evolutionary Approach. 1st edition. Addison-Wesley, 1973.