एपीए उद्धरण

Cunningham, W. P. (2010). Environmental science: A global concern. Boston: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2010.

एमएलए उद्धरण

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2010.