APA Edition Citation

Pfafflin, J. R., & Ziegler, E. N. (1976). Encyclopedia of environmental science and engineering. 2V (6th ed.).

Chicago Edition Citation

Pfafflin, J. R., and E. N. Ziegler. Encyclopedia of Environmental Science and Engineering. 2V. 6th ed. 1976.

MLA Edition Citation

Pfafflin, J. R., and E. N. Ziegler. Encyclopedia of Environmental Science and Engineering. 2V. 6th ed. 1976.

Warning: These citations may not always be 100% accurate.