APA aipamena

Field, B. C. (2008). Natural resources economics an introduction second edition. Waveland Press.

Chicago Style aipamena

Field, Barry C. Natural Resources Economics an Introduction Second Edition. Waveland Press, 2008.

MLA aipamena

Field, Barry C. Natural Resources Economics an Introduction Second Edition. Waveland Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.