APA (7th ed.) Citation

Foin, T. C. J. (1976). Ecological systems and the environment. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Foin, Theodore C. Jr. Ecological Systems and the Environment. Boston: Houghton Mifflin, 1976.

MLA (9th ed.) Citation

Foin, Theodore C. Jr. Ecological Systems and the Environment. Houghton Mifflin, 1976.