Sadiq,Naeem, & Khan, A. H. ISO 14001 Step by step: A practical (2nd ed.). IT Governance,2019.
Citazione stile Chigago Style (17a edizione)Sadiq,Naeem, e Asif Hayat Khan. ISO 14001 Step by Step: A Practical. 2nd ed. United Kingdom: IT Governance,2019.
Citatione MLA (9a ed.)Sadiq,Naeem, e Asif Hayat Khan. ISO 14001 Step by Step: A Practical. 2nd ed. IT Governance,2019.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.