Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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