1. ASHRAE Standard 55 (2004).Thermal environmental conditions for human occupancy, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, GA.
2. Department of Occupational Safety & Health (DOSH), Malaysia – National Institute of Occupational Safety & Health (2013).
3. Fisk W.J., 2000. Estimates of potential nationwide productivity and health benefits from better indoor environments: an update. In: Spengler John D., Samet Jonathan M., McCarthy John F. (Eds.),Indoor Air Quality Handbook, Chapter 4. McGraw Hill, New York.
4. Heath G.A. and Mendell M.J. (2002). Do indoor environments in schools influence student performance? A review of the literaure. pp. 802–807 inProceeding of Indoor Air 2002, Vol.1June 30-July 5, 2002, Monterey, Calif.