Layout of Boon Lay Bus Interchange (April 1989 – Present). Retrieved from scanned copy of Boon Lay Bus Interchange brochure from http://sgwiki.com/wiki/Buses
Layout of Boon Lay Bus Interchange (April 1989 – Present). Retrieved from scanned copy of Boon Lay Bus Interchange brochure from http://sgwiki.com/wiki/Buses