APA (7th ed.) Citation

Gutnik, M. J. (1990). The challenge of clean air. Enslow Publishers.

Chicago Style (17th ed.) Citation

Gutnik, Martin J. The Challenge of Clean Air. Hillside, N.J.: Enslow Publishers, 1990.

MLA (9th ed.) Citation

Gutnik, Martin J. The Challenge of Clean Air. Enslow Publishers, 1990.