APA aipamena

Barbier, E. B. (2005). Natural resources and economic development. Cambridge University Press.

Chicago Style aipamena

Barbier, Edward B. Natural Resources and Economic Development. Cambridge University Press, 2005.

MLA aipamena

Barbier, Edward B. Natural Resources and Economic Development. Cambridge University Press, 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.