APA aipamena

(1971). Vol. 66, № 7; Economic Geology. 1971.

Chicago Style aipamena

Vol. 66, № 7; Economic Geology. 1971, 1971.

MLA aipamena

Vol. 66, № 7; Economic Geology. 1971, 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.