1. Horvath, Construction For Sustainable Development - A Research And Educational Agenda. Berkeley, (California, USA, 26-28 August 1999).
2. Department of Statistic Malaysia, Gross Domestic Product 2005 – 2013, (2014).
3. Green Building Index (GBI) (www.greenbuildingindex.org. Retrieved December 6, 2017).
4. Royal Institution of Chartered Surveyors (RICS) ‘Green Value – Green Buildings, Growing Assets, (Canada, 2005).
5. The value of sustainability in real estate: a review from a valuation perspective