APA Citatie

Pfafflin, J. R., & Ziegler, E. N. (1998). Encyclopedia of Environmental Science and Engineering (4th ed., Revised and updated.). Gordon And Breach Science Publishers.

Chicago Style citaat

Pfafflin, James R., en Edward N. Ziegler. Encyclopedia of Environmental Science and Engineering. 4th ed., Revised and updated. Australia: Gordon And Breach Science Publishers, 1998.

MLA citatie

Pfafflin, James R., en Edward N. Ziegler. Encyclopedia of Environmental Science and Engineering. 4th ed., Revised and updated. Gordon And Breach Science Publishers, 1998.