APA (7th ed.) Citation

Pfafflin, J. R., & Ziegler, E. N. (1992). Encyclopedia of environmental science and engineering. Gordon and Breach Science Publishers.

Chicago Style (17th ed.) Citation

Pfafflin, J. R., and E. N. Ziegler. Encyclopedia of Environmental Science and Engineering. Philadelphia: Gordon and Breach Science Publishers, 1992.

MLA (9th ed.) Citation

Pfafflin, J. R., and E. N. Ziegler. Encyclopedia of Environmental Science and Engineering. Gordon and Breach Science Publishers, 1992.