एपीए उद्धरण

Thornbury, W. D. (2004). Principles of geomorphology (2nd ed.). CBS Publishers & Distributors Pvt Ltd.

शिकागो स्टाइल उद्धरण

Thornbury, William D. Principles of Geomorphology. 2nd ed. Chennai: CBS Publishers & Distributors Pvt Ltd, 2004.

एमएलए उद्धरण

Thornbury, William D. Principles of Geomorphology. 2nd ed. CBS Publishers & Distributors Pvt Ltd, 2004.