List of sources:
Draper, J.R. The engineer's contribution; a history of the South African Institution of Mechanical Engineers, 1892-1967. Johannesburg, 1967.
John Alfred Vaughan. Grace's Guide to British Industrial History. Retrieved on 24 March 2021 from https://www.gracesguide.co.uk/John_Alfred_Vaughan
Journal of the Transvaal Institute of Mechanical Engineers, 1905-1910, Vol. 4-8.
National Automated Archival Information Retrieval System (NAAIRS). http://national.archives.gov.za/naairs.htm Documents relating to Vaughan, John Alfred / Vaughan, J.A.
National Archives Repository (TAB), Source MHG, Vol. 0, Ref. 3784/1938: death notice, John Alfred Vaughan.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
South African Association for the Advancement of Science. Report, 1903, 1905/6, 1910, 1918: Lists of members; 1918, paper by Vaughan.
South African who's who, 1908, 1917/8, 1919/20, 1923/4, 1927/8.
Transactions of the South African Institution of Engineers, 1913, Vol. 1, index page.
University of the Cape of Good Hope. Calendar, 1906/7.