APA Style

Smith, B, F., Enger, E, D. (2010). Environmental Science A Study of Interrelationships Twelfth Edition (Pertama). New York: McGRAW-HILL BOOK COMPANY, Inc.

MLA Style

Smith, Bradley, F.., Enger, Eldon, D.. "Environmental Science A Study of Interrelationships Twelfth Edition". Pertama New York: McGRAW-HILL BOOK COMPANY, Inc, 2010. Text.