Gaya APA
DAVIS, M, L., CORNWELL, D, A. (1991).
Introduction to environmental engineering (2rd ed.).
Boston:
The McGraw-Hill.
Gaya MLA
DAVIS, Mackenzie, L.., CORNWELL, David, A..
"Introduction to environmental engineering ".
2rd ed.
Boston:
The McGraw-Hill,
1991.
Buku.