APA aipamena

(1937). Vol. 32, № 6-8; Economic Geology. 1937.

Chicago Style aipamena

Vol. 32, № 6-8; Economic Geology. 1937, 1937.

MLA aipamena

Vol. 32, № 6-8; Economic Geology. 1937, 1937.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.