Citazione Stile APA (7a Edizione)

Callan, S., & Thomas, J. M. (2004). Environmental economics & management: Theory, policy, and applications (3rd ed.). Thomson/South-Western.

Citazione stile Chigago Style (17a edizione)

Callan, Scott, e Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. 3rd ed. Mason, Ohio: Thomson/South-Western, 2004.

Citatione MLA (9a ed.)

Callan, Scott, e Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. 3rd ed. Thomson/South-Western, 2004.