एपीए उद्धरण

Plummer, C. C. (2007). Physical geology. New York, NY: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Plummer, Charles C. Physical Geology. New York, NY: McGraw-Hill, 2007.

एमएलए उद्धरण

Plummer, Charles C. Physical Geology. New York, NY: McGraw-Hill, 2007.