APA aipamena

(1973). Vol. 71, № 22; OiL and Gas journal. 1973.

Chicago Style aipamena

Vol. 71, № 22; OiL and Gas Journal. 1973, 1973.

MLA aipamena

Vol. 71, № 22; OiL and Gas Journal. 1973, 1973.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.