Cita APA (7th ed.)
Tyler, M., & Spoolman, S. (2008). Environmental science: Problems, concepts, and solutions (12th ed.). Thomson.
Cita Chicago (17th ed.)
Tyler, Miller, i Scott Spoolman. Environmental Science: Problems, Concepts, and Solutions. 12th ed. Australia: Thomson, 2008.
Cita MLA (9th ed.)
Tyler, Miller, i Scott Spoolman. Environmental Science: Problems, Concepts, and Solutions. 12th ed. Thomson, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.