1. Climate and weather: Extreme measures
2. Konrad-Adenauer-Stiftung Media Programme Asia 2013 http://ejap.org/environmental-issues-in-asia/energy-consumption.html
3. Energy Market Authority 2014 https://www.ema.gov.sg/Singapore_Energy_Statistics.aspx
4. National Climate Change Secretariat and National Research Foundation 2011 https://www.nccs.gov.sg/sites/nccs/files/AirconPrimer.pdf
5. National Environment Agency 2010 http://www.nea.gov.sg/docs/default-source/weather-and-climate/second-nc.pdf