Gaya APA

Davis, M, L., Masten, S, J. (2004). Principles of environmental engineeriong and science international edition (international edition). New York: McGraw-Hill Co., Inc.

Gaya MLA

Davis, Mackenzie, L.., Masten, Susan, J.. "Principles of environmental engineeriong and science international edition". international edition New York: McGraw-Hill Co., Inc, 2004. ML.