APA Style
D, E., F, S. (2010).
Enviromental Science : A Study Of Interrelationships (Twefth Edition).
Boston:
McGraw-Hill.
MLA Style
D, Enger,Eldon., F, Smith,Bradley.
"Enviromental Science : A Study Of Interrelationships".
Twefth Edition
Boston:
McGraw-Hill,
2010.
Textbook.