Fitzhardinge, L. F. "William Morris (Billy) Hughes (1862–1952)". Hughes, William Morris (Billy) (1862–1952). National Centre of Biography, Australian National University. Retrieved 24 September 2020. {{cite book}}: |website= ignored (help)
*Gericke, Bradley T (2001). Civil Wars in Britain; 1640–1646(PDF) (PhD). U.S. Army Command and General Staff College. Archived(PDF) from the original on 9 March 2014.
*Gericke, Bradley T (2001). Civil Wars in Britain; 1640–1646(PDF) (PhD). U.S. Army Command and General Staff College. Archived(PDF) from the original on 9 March 2014.