Gaya APA

Davis, M, L. (2004). (PASCA - TEKNIK SIPIL) Principles of Environmental Engineering and Science "International Edition" (1). USA: Mc Graw-Hill International Book Company.

Gaya MLA

Davis, Mackenzie, L.. "(PASCA - TEKNIK SIPIL) Principles of Environmental Engineering and Science "International Edition"". 1 USA: Mc Graw-Hill International Book Company, 2004. .