APA (7th ed.) Zitazioa

International Chamber of Commerce. (1991). Guide to Effective Environmental Auditing: научное издание.

Chicago Style (17th ed.) Zitazioa

International Chamber of Commerce. Guide to Effective Environmental Auditing: научное издание. 1991.

MLA (9th ed.) Zitazioa

International Chamber of Commerce. Guide to Effective Environmental Auditing: научное издание. 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.