APA (7th ed.) Citation

Turk, A., Turk, J., & Wittes, J. T. (1972). Ecology, pollution, environment. Saunders.

Chicago Style (17th ed.) Citation

Turk, Amos, Jonathan Turk, and Janet T. Wittes. Ecology, Pollution, Environment. Philadelphia: Saunders, 1972.

MLA (9th ed.) Citation

Turk, Amos, et al. Ecology, Pollution, Environment. Saunders, 1972.