1. Application guidelines for the assessment and accreditation of energy service companies (Auditing services), March 2005. Energy Sustainability Unit, Department of Building, National University of Singapore.
2. Code of practice for fire regulation in buildings.
3. Regulating appliance energy efficiency in Canada some similarities and differences with the US;des Rosiers;Energy and Buildings,1997
4. Guidelines for good indoor air quality in office premises, 1996. Ministry of Environment, Singapore.
5. Hartman, T.P.E., 2001. Centrifugal chillers—all variable speed centrifugal chiller plants. Ashrae Journal, September.