APA aipamena

Lecomber, R. (1979). The economics of natural resources.

Chicago Style aipamena

Lecomber, Richard. The Economics of Natural Resources. London, Macmillan, 1979.

MLA aipamena

Lecomber, Richard. The Economics of Natural Resources. 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.