CUNNINGHAM, W. P. (2004). Principles of environmental science: Inquiry and applications. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)CUNNINGHAM, William P. Principles of Environmental Science: Inquiry and Applications. McGraw-Hill, 2004.
Lua MLA (9ú heag.)CUNNINGHAM, William P. Principles of Environmental Science: Inquiry and Applications. McGraw-Hill, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.