 
| Type | Valeur | 
|---|---|
| Titre | William Marshal, Knight-Errant, Baron, and Regent of England | 
| Painter, Sidney, William Marshal, Knight-Errant, Baron, and Regent ofEngland, Page number: p. 183 | 
| Painter, Sidney. William Marshal, Knight-Errant, Baron, and Regent ofEngland. 1933., Baltimore, repr. Toronto: Johns Hopkins Press, repr.University of Toronto Press, 1982. |