Παραπομπή σε μορφή APA (7η εκδ.)

Callan, S., & Thomas, J. M. (2000). Environmental economics and management: Theory, policy, and applications (2nd ed.). Dryden Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Callan, Scott, και Janet M. Thomas. Environmental Economics and Management: Theory, Policy, and Applications. 2nd ed. Fort Worth: Dryden Press, 2000.

Παραπομπή σε μορφή MLA (9th εκδ.)

Callan, Scott, και Janet M. Thomas. Environmental Economics and Management: Theory, Policy, and Applications. 2nd ed. Dryden Press, 2000.