Weir, A. (2005). Queen isabella: Treachery, adultery, and murder in medieval england. Ballantine Books.
Lua i Stíl Chicago (17ú heag.)Weir, Alison. Queen Isabella: Treachery, Adultery, and Murder in Medieval England. New York: Ballantine Books, 2005.
Lua MLA (9ú heag.)Weir, Alison. Queen Isabella: Treachery, Adultery, and Murder in Medieval England. Ballantine Books, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.