एपीए उद्धरण

Cunningham, W. P. (2002). Principles of environmental science: Inquiry and applications. McGraw-Hill.

शिकागो स्टाइल उद्धरण

Cunningham, William P. Principles of Environmental Science: Inquiry and Applications. McGraw-Hill, 2002.

एमएलए उद्धरण

Cunningham, William P. Principles of Environmental Science: Inquiry and Applications. McGraw-Hill, 2002.