APA aipamena

Field, B. C., & Field, B. C. (2006). Environmental Economics: An introductionBarry C. Field and Martha K. Field. McGraw-Hill.

Chicago Style aipamena

Field, Barry C., and Barry C. Field. Environmental Economics: An IntroductionBarry C. Field and Martha K. Field. McGraw-Hill, 2006.

MLA aipamena

Field, Barry C., and Barry C. Field. Environmental Economics: An IntroductionBarry C. Field and Martha K. Field. McGraw-Hill, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.