Cita APA (7th ed.)

Cunningham, W. P., & Cunningham, M. A. (2015). Environmental science: A global concern (Thirteenth edition.). McGraw-Hill Education.

Cita Chicago (17th ed.)

Cunningham, William P., i Mary Ann Cunningham. Environmental Science: A Global Concern. Thirteenth edition. New York, NY: McGraw-Hill Education, 2015.

Cita MLA (9th ed.)

Cunningham, William P., i Mary Ann Cunningham. Environmental Science: A Global Concern. Thirteenth edition. McGraw-Hill Education, 2015.