एपीए उद्धरण

Callan, S. J. (2004). Environmental economics and management: Theory, policy, and applications. Australia: Thomson.

शिकागो स्टाइल उद्धरण

Callan, Scott J. Environmental Economics and Management: Theory, Policy, and Applications. Australia: Thomson, 2004.

एमएलए उद्धरण

Callan, Scott J. Environmental Economics and Management: Theory, Policy, and Applications. Australia: Thomson, 2004.