APA (7th ed.) Zitazioa

(1980). Design recommendations for query languages / S.L. Ehrenreich.

Chicago Style (17th ed.) Zitazioa

Design Recommendations for Query Languages / S.L. Ehrenreich. 1980.

MLA (9th ed.) Zitazioa

Design Recommendations for Query Languages / S.L. Ehrenreich. 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.