APA (7th ed.) Zitazioa
ebrary, Inc, & Sheldon, C. (1997). ISO 14001 and beyond: Environmental management systems in the real world. Greenleaf Pub..
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, eta Christopher Sheldon. ISO 14001 and Beyond: Environmental Management Systems in the Real World. Sheffield: Greenleaf Pub., 1997.
MLA (9th ed.) Zitazioa
ebrary, Inc, eta Christopher Sheldon. ISO 14001 and Beyond: Environmental Management Systems in the Real World. Greenleaf Pub., 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.