एपीए उद्धरण

Ford, D., & Williams, P. (2007). Karst hydrogeology and geomorphology. John Wiley.

शिकागो स्टाइल उद्धरण

Ford, Derek, और Paul Williams. Karst Hydrogeology and Geomorphology. Chichester: John Wiley, 2007.

एमएलए उद्धरण

Ford, Derek, और Paul Williams. Karst Hydrogeology and Geomorphology. John Wiley, 2007.