एपीए उद्धरण

Sanders, J. E. (1981). Principles of physical geology. John willey &sons.

शिकागो स्टाइल उद्धरण

Sanders, John E. Principles of Physical Geology. New york: John willey &sons, 1981.

एमएलए उद्धरण

Sanders, John E. Principles of Physical Geology. John willey &sons, 1981.