एपीए उद्धरण

Callan, S. J., & Scott J. Callan; Janet M. Thomas. Environmental economics & management: Theory, policy, and applications. Mason, OH: Thomson/South-Western.

शिकागो स्टाइल उद्धरण

Callan, Scott J., और Scott J. Callan; Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. Mason, OH: Thomson/South-Western.

एमएलए उद्धरण

Callan, Scott J., और Scott J. Callan; Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. Mason, OH: Thomson/South-Western.