Toh, Chin Chye (1989). "Dr. Toh Chin Chye [oral history interview, accession no. A1063, reel 1]" (Interview). National Archives of Singapore.: "State symbols". Access to Archives Online (a2o), National Archives of Singapore. Archived from the original on 8 February 2012. Retrieved 4 November 2007.
Singapore Arms and Flag and National Anthem Rules (Cap. 296, R 1, 2004 Rev. Ed.), archived from the original on 31 March 2009, as amended by the Singapore Arms and Flag and National Anthem (Amendment) Rules 2007 (S 377/2007), archived from the original on 27 March 2009.
Toh, Chin Chye (1989). "Dr. Toh Chin Chye [oral history interview, accession no. A1063, reel 1]" (Interview). National Archives of Singapore.: "State symbols". Access to Archives Online (a2o), National Archives of Singapore. Archived from the original on 8 February 2012. Retrieved 4 November 2007.
Singapore Arms and Flag and National Anthem Rules (Cap. 296, R 1, 2004 Rev. Ed.), archived from the original on 31 March 2009, as amended by the Singapore Arms and Flag and National Anthem (Amendment) Rules 2007 (S 377/2007), archived from the original on 27 March 2009.