APA aipamena

(1998). Vol. 96, № 14; OiL and Gas journal. 1998.

Chicago Style aipamena

Vol. 96, № 14; OiL and Gas Journal. 1998, 1998.

MLA aipamena

Vol. 96, № 14; OiL and Gas Journal. 1998, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.