Sadiq,Naeem, & Khan, A. H. ISO 14001 Step by step: A practical (2nd ed.). IT Governance,2019.
Cita Chicago (17th ed.)Sadiq,Naeem, i Asif Hayat Khan. ISO 14001 Step by Step: A Practical. 2nd ed. United Kingdom: IT Governance,2019.
Cita MLA (9th ed.)Sadiq,Naeem, i Asif Hayat Khan. ISO 14001 Step by Step: A Practical. 2nd ed. IT Governance,2019.
Atenció: Aquestes cites poden no estar 100% correctes.