1. Organisation for Economic Co-operation and Development (OECD), Eco-Innovation in Industry: Enabling Green Growth (OECD Publishing, Paris, 2009)
2. Aja O. C., Al-Kayiem H. H., Zewge M. G., and Joo M. S., “Overview of Hazardous Waste Management Status in Malaysia”, Manag. Hazard. Wastes, October (2016)
3. Does a firm’s innovation category matter in practising eco-innovation? Evidence from the lens of Malaysia companies practicing green technology
4. Organisation for Economic Cooperation and Development (OECD), Green Growth Indicators (OECD Publishing, Paris, 2014)
5. Rizos V., Behrens A., and Taranic I., “Measuring progress in eco-innovation”, ISBN: 978-94-6138-466-9 (2015)