APA-referens

James R. Pfafflin & Edward N. Ziegler. (2006). Encyclopedia of environmental science and engineering (5th ed.). CRC.

Chicago-stil citat

James R. Pfafflin och Edward N. Ziegler. Encyclopedia of Environmental Science and Engineering. 5th ed. Boca Raton: CRC, 2006.

MLA-referens

James R. Pfafflin och Edward N. Ziegler. Encyclopedia of Environmental Science and Engineering. 5th ed. CRC, 2006.