1. Agamuthu, P., Fauziah, P.H., Khidzir, K. M., Aiza, N., 2007. Sustainable waste wanagement – Asian perspectives. In: Proceedings of the International Conference on Sustainable Waste Management, India, pp. 15–26.
2. The theory of planned behaviour;Ajzen;Organizational Behaviour and Human Decision Processes,1991
3. Organizational research: determining sample size in survey research;Bartlett;Information Technology. Learning and Performance Journal,2001
4. Chuah, 2011. Sustainability Development through Energy Efficiency Initiatives in Malaysia. In: 15th International Conference on ISO & TQM (15-ICIT), 26–28th July 2011, Universiti TenagaNasional, Kajang, Malaysia.
5. Statistical Power Analysis for the Behavioural Sciences;Cohen,1988