Example:
Bukit Brown (n.d.). Bukit Brown: Living Museum of History and Heritage. Retrived from http://www.bukitbrown.org/
Chew, H. M. (2016). Controversy over Cross Island Line: 12 questions about the MRT line answered. The Straits Times. Retrieved from http://www.straitstimes.com/singapore/controversy-over-cross-island-line-12-questions-about-the-mrt-line-answered
Chong, I., Li, L., Lim, E., Teo, J., Woon, T. W. (2012). What Do People Say?. SOS Bukit Brown. Retrieved from https://sosbukitbrown.wordpress.com/more-on-bukit-brown/what-do-people-say/