एपीए उद्धरण

Collard,David. Economics,growth and sustainable enviroments. St.Martin's Press.

शिकागो स्टाइल उद्धरण

Collard,David. Economics,growth and Sustainable Enviroments. New York: St.Martin's Press.

एमएलए उद्धरण

Collard,David. Economics,growth and Sustainable Enviroments. St.Martin's Press.