Gaya APA

Ziegler, J, R, P, E, N. (2006). Encyclopedia of environmental science and engineering (ed.5). Boca Raton: Taylor & Francis Group.

Gaya MLA

Ziegler, James, R., Pfafflin,, Edward, N.. "Encyclopedia of environmental science and engineering". ed.5 Boca Raton: Taylor & Francis Group, 2006. Text.