Gaya APA

Smith, E, D, E, ;, B, F. (2006). Environmental Science : A Study of Interrelationships (10th ed.) (10). New York: McGraw-Hill.

Gaya MLA

Smith, Eldon, D., Enger, ;, Bradley, F.. "Environmental Science : A Study of Interrelationships (10th ed.)". 10 New York: McGraw-Hill, 2006. Text.