एपीए उद्धरण

Sewell,W R Derrck. (1974). Environmental quality. Sage Sage Publications Ltd.

शिकागो स्टाइल उद्धरण

Sewell,W R Derrck. Environmental Quality. London: Sage Sage Publications Ltd, 1974.

एमएलए उद्धरण

Sewell,W R Derrck. Environmental Quality. Sage Sage Publications Ltd, 1974.