APA (7th ed.) Zitazioa

Sadiq,Naeem, & Khan, A. H. ISO 14001 Step by step: A practical (2nd ed.). IT Governance,2019.

Chicago Style (17th ed.) Zitazioa

Sadiq,Naeem, eta Asif Hayat Khan. ISO 14001 Step by Step: A Practical. 2nd ed. United Kingdom: IT Governance,2019.

MLA (9th ed.) Zitazioa

Sadiq,Naeem, eta Asif Hayat Khan. ISO 14001 Step by Step: A Practical. 2nd ed. IT Governance,2019.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.