Cunningham, W. P., & Cunningham, M. A. (2015). Environmental science: A global concern (Thirteenth edition.). McGraw-Hill Education.
Lua i Stíl Chicago (17ú heag.)Cunningham, William P., agus Mary Ann Cunningham. Environmental Science: A Global Concern. Thirteenth edition. New York, NY: McGraw-Hill Education, 2015.
Lua MLA (9ú heag.)Cunningham, William P., agus Mary Ann Cunningham. Environmental Science: A Global Concern. Thirteenth edition. McGraw-Hill Education, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.