*
Legislative Council, ''The Straits Times'', 8 May 1875, page 2.
*
Government Gazette, ''The Straits Times'', 22 May 1875, page 5.
* Foster, Joseph, ''Men-at-the-bar''. Printed for the author by Hazell, Watson, and Viney, 1885.
*
"Government Gazette", 28 August., ''Straits Times Weekly Issue'', 1 September 1891, page 6.
*
On Promotion Bent., ''Straits Times Weekly Issue'', 16 December 1891, page 9.
*
The New Colonial Secretary., ''Straits Times Weekly Issue'', 16 February 1892, page 7.
* Braddell, Roland St. John; Brooke, Gilbert Edward and Makepeace, Walter,
One Hundred Years of Singapore'. London: Murray, 1921.
*
Colonial Secretariat, ''The Straits Times'', 12 March 1924, page 8.
*
Expulsion of Hau Say Hoan, ''The Straits Times'', 30 December 1939, page 10.
*
Mr. S. W. Jones, ''The Straits Times'', 28 January 1942, page 4.
* ''The Statesman's Year-Book 1941''. London: Palgrave, 1941.
* ''The Statesman's Year-Book 1955''. London: Palgrave, 1955.
* ''The Statesman's Year-Book 1956''. London: Palgrave, 1956.
* ''The Statesman's Year-Book 1960''. London: Palgrave, 1960.
* Allen, J. de Vere, "Malayan Civil Service, 1874-1941: Colonial Bureaucracy/Malayan Elite", ''Comparative Studies in Society and History'' Vol. 12, No. 2. UK: Cambridge University Press, April 1970, pages 149 - 178.
* Andaya, Barbara Watson and Andaya, Leonard Y.,
A History of Malaysia'. Hong Kong: Palgrave Macmillan, 1982.
* Lepoer, Barbara Leitch, ed.,
Singapore: A Country Study'. Washington: GPO for the Library of Congress, 1989.
* Sandhu, Kernial Singh and Wheatley, Paul,
Management of Success: The Moulding of Modern Singapore'. Institute of Southeast Asian Studies, 1989.
* "BLYTHE, Wilfred Lawson", ''Who was Who''. London: A & C Black, 1996.
* "CALDECOTT, Sir Andrew", ''Who was Who''. London: A & C Black, 1996.
* "DAVID, Sir Edgeworth (Beresford)", ''Who was Who''. London: A & C Black, 1996.
* "GOODE, Sir William (Allmond Codrington)", ''Who was Who''. London: A & C Black, 1996.
* "HEMMANT, George", ''Who was Who''. London: A & C Black, 1996.
* "HOSE, Edward Shaw", ''Who was Who''. London: A & C Black, 1996.
* "MARRIOTT, Sir Hayes", ''Who was Who''. London: A & C Black, 1996.
* "McKERRON, Sir Patrick (Alexander Bruce)", ''Who was Who''. London: A & C Black, 1996.
* "SCOTT, Sir John", ''Who was Who''. London: A & C Black, 1996.
* "SMALL, Sir Alexander Sym", ''Who was Who''. London: A & C Black, 1996.
* "SWETTENHAM, Sir Alexander", ''Who was Who''. London: A & C Black, 1996.
* Lippman, David H.,
, ''World War II Plus 55'', 1998.
* Omar, Marsita,
, ''Singapore Infopedia''. National Library, Singapore, 5 April 2006.
* Sutherland, Duncan,
, ''Singapore Infopedia''. National Library, Singapore, 16 September 2009.
* Quah, Jon S. T.,
Public Administration Singapore-Style'. UK: Emerald Group Publishing, 2010.
* Bertram, Anton,
The Colonial Service'. New York: Cambridge University Press, 2011.
* Sutherland, Duncan,
, ''Singapore Infopedia''. National Library, Singapore, 25 February 2011.
*
, ''World Statesmen.org'', retrieved on 13 March 2012.
*
, ''World Statesmen.org'', retrieved on 13 March 2012.
*
, ''World Statesmen.org'', retrieved on 13 March 2012.
*
, ''Singapore Infopedia'', retrieved on 29 July 2014.