Cita APA (7th ed.)

FIELD, B. C., & FIELD, M. K. (2002). Environmental economics: An introduction.-- ed.3. McGraw-Hill.

Cita Chicago (17th ed.)

FIELD, Barry C., i Martha K. FIELD. Environmental Economics: An Introduction.-- Ed.3. Boston: McGraw-Hill, 2002.

Cita MLA (9th ed.)

FIELD, Barry C., i Martha K. FIELD. Environmental Economics: An Introduction.-- Ed.3. McGraw-Hill, 2002.