1. Environment & business- Profiting from Cleaner Production, Cleaner Production Manual published by "Environment Australia", Canberra: Australia; 2001. p. 38.
2. Khan Z, Wilson D. “Cleaner Production Project REport for Smithfield-Wetherill Park Industrial Area”, NSW, Australia; March 2003. p. 170.
3. Barker C. Cleaner Production Engineer, Advitech Pty Ltd, New Castle, NSW, Australia: Personal Communications; January 2001–October 2004.
4. International Standards – ISO14001: Environmental Management Systems – Requirements with guidance for use; 2004.
5. EPA- Unpublished Cleaner Production Module-3, NSW-Australia; 2002. p. 89.