एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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