Ee, Gerard (2009-05-23). Archived copy (Speech). Circle Line Discovery. Singapore. Archived from the original on 2011-04-11. Retrieved 2012-01-06.{{cite speech}}: CS1 maint: archived copy as title (link)
Ee, Gerard (2009-05-23). Archived copy (Speech). Circle Line Discovery. Singapore. Archived from the original on 2011-04-11. Retrieved 2012-01-06.{{cite speech}}: CS1 maint: archived copy as title (link)