Cita APA (7th ed.)

Callan, S., & Thomas, J. M. (2013). Environmental economics & management: Theory, policy, and applications (6th ed.). South-Western Cengage Learning.

Cita Chicago (17th ed.)

Callan, Scott, i Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. 6th ed. Australia: South-Western Cengage Learning, 2013.

Cita MLA (9th ed.)

Callan, Scott, i Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. 6th ed. South-Western Cengage Learning, 2013.