Tham khảo Elizabeth_xứ_York,_Công_tước_phu_nhân_xứ_Suffolk
1 2 3 (tiếng Anh)Halsted, Caroline A. Richard III, as Duke of Gloucester and King of England. Philadelphia: Carey and Hart, 1844. 37.
↑ (tiếng Anh)Clutterbuck, Rev. Robert Hawley. Notes on the Parishes of Fyfield, Kimpton, Penton Mewsey, Weyhill and Wherwell in the County of Hampshire. Salisbury, UK: bennett Brothers, 1898. 101.
↑ (tiếng Anh)Weir, Alison. Mistress of the Monarchy: The Life of Katherine of Swynford, Duchess of Lancaster. New York: Ballantine, 2009. 296.
1 2 3 (tiếng Anh)Wagner, John A. Encyclopedia of the Wars of the Roses. Santa Barbara, CA: ABC-CLIO, 2001. 210-211.
↑ (tiếng Anh)Spaltro, Kathleen & Noeline Bridge. Royals of England: A Guide for Readers, Travelers, and Genealogists. Lincoln, NE: iUniverse, 2005. 138.
