Callan, S., & Thomas, J. M. (2013). Environmental economics & management: Theory, policy, and applications (6th ed.). South-Western Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Callan, Scott, agus Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. 6th ed. Australia: South-Western Cengage Learning, 2013.
Lua MLA (9ú heag.)Callan, Scott, agus Janet M. Thomas. Environmental Economics & Management: Theory, Policy, and Applications. 6th ed. South-Western Cengage Learning, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.