APA aipamena

FIELD, B. C., & FIELD, B. C. (1994). Environmental Economics An Introduction Barry C. Field. McGraw-Hill.

Chicago Style aipamena

FIELD, Barry C., and Barry C. FIELD. Environmental Economics An Introduction Barry C. Field. McGraw-Hill, 1994.

MLA aipamena

FIELD, Barry C., and Barry C. FIELD. Environmental Economics An Introduction Barry C. Field. McGraw-Hill, 1994.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.