Dyfyniad APA

Callan, S., & Thomas, J. M. (1996). Environmental economics and management: Theory, policy, and applications. Irwin.

Dyfyniad Arddull Chicago

Callan, Scott, and Janet M. Thomas. Environmental Economics and Management: Theory, Policy, and Applications. Chicago: Irwin, 1996.

Dyfyniad MLA

Callan, Scott, and Janet M. Thomas. Environmental Economics and Management: Theory, Policy, and Applications. Irwin, 1996.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.