एपीए उद्धरण

Covington, G. (2010). Water management. Apple Accademics.

शिकागो स्टाइल उद्धरण

Covington, Gareth. Water Management. Oakville: Apple Accademics, 2010.

एमएलए उद्धरण

Covington, Gareth. Water Management. Apple Accademics, 2010.