एपीए उद्धरण

Verma C.L. (2013). Research in Physical Geography and Earth Science. Swastik Publications.

शिकागो स्टाइल उद्धरण

Verma C.L. Research in Physical Geography and Earth Science. New Delhi: Swastik Publications, 2013.

एमएलए उद्धरण

Verma C.L. Research in Physical Geography and Earth Science. Swastik Publications, 2013.