Johnson 1984, p. 3; Clark 1884a, p. 433; "Conservation Bulletin, Issue 19, March 1993"(PDF). English Heritage. Archived from the original(PDF) on 1 January 2015. Retrieved 30 December 2014. Johnson, Stephen (1984). Conisbrough Castle, South Yorkshire. Edinburgh, UK: Her Majesty's Stationery Office. ISBN0-11-671485-9. Clark, George T. (1884a). Mediaeval Military Architecture in England. Vol. 1. London, UK: Wyman and sons.
Clark 1884a, p. 433; "List Entry", English Heritage, archived from the original on 13 January 2015, retrieved 30 December 2014 Clark, George T. (1884a). Mediaeval Military Architecture in England. Vol. 1. London, UK: Wyman and sons.
Johnson 1984, pp. 14–15, 17; Clark 1884b, p. 133; "List Entry". English Heritage. Archived from the original on 13 January 2015. Retrieved 30 December 2014. Johnson, Stephen (1984). Conisbrough Castle, South Yorkshire. Edinburgh, UK: Her Majesty's Stationery Office. ISBN0-11-671485-9. Clark, George T. (1884b). "Conisborough Castle". The Yorkshire Archaeological Journal. 8: 124–157.
Johnson 1984, p. 15; "List Entry". English Heritage. Archived from the original on 13 January 2015. Retrieved 30 December 2014. Johnson, Stephen (1984). Conisbrough Castle, South Yorkshire. Edinburgh, UK: Her Majesty's Stationery Office. ISBN0-11-671485-9.
Johnson 1984, p. 3; Clark 1884a, p. 433; "Conservation Bulletin, Issue 19, March 1993"(PDF). English Heritage. Archived from the original(PDF) on 1 January 2015. Retrieved 30 December 2014. Johnson, Stephen (1984). Conisbrough Castle, South Yorkshire. Edinburgh, UK: Her Majesty's Stationery Office. ISBN0-11-671485-9. Clark, George T. (1884a). Mediaeval Military Architecture in England. Vol. 1. London, UK: Wyman and sons.
Clark 1884a, p. 433; "List Entry", English Heritage, archived from the original on 13 January 2015, retrieved 30 December 2014 Clark, George T. (1884a). Mediaeval Military Architecture in England. Vol. 1. London, UK: Wyman and sons.
Johnson 1984, pp. 14–15, 17; Clark 1884b, p. 133; "List Entry". English Heritage. Archived from the original on 13 January 2015. Retrieved 30 December 2014. Johnson, Stephen (1984). Conisbrough Castle, South Yorkshire. Edinburgh, UK: Her Majesty's Stationery Office. ISBN0-11-671485-9. Clark, George T. (1884b). "Conisborough Castle". The Yorkshire Archaeological Journal. 8: 124–157.
Johnson 1984, p. 15; "List Entry". English Heritage. Archived from the original on 13 January 2015. Retrieved 30 December 2014. Johnson, Stephen (1984). Conisbrough Castle, South Yorkshire. Edinburgh, UK: Her Majesty's Stationery Office. ISBN0-11-671485-9.