एपीए उद्धरण

Coenraads, R. R. (2007). Geologica: : Earth's dynamic forces. Millennium House.

शिकागो स्टाइल उद्धरण

Coenraads, Robert R. Geologica: : Earth's Dynamic Forces. Millennium House, 2007.

एमएलए उद्धरण

Coenraads, Robert R. Geologica: : Earth's Dynamic Forces. Millennium House, 2007.