Tait 1896, hlm. 403; Cokayne 1959, hlm. 903; Richardson I 2011, hlm. 365–8; Richardson II 2011, hlm. 211–12; Horrox 2004. Tait, James (1896). 'Plantagenet', Edward. 45. Dictionary of National Biography, 1885-1890. hlm. 401–4. Diakses tanggal 20 October 2012. Cokayne, George Edward (1959). The Complete Peerage, edited by Geoffrey H. White. XII(2). London: St. Catherine Press. Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham. I (edisi ke-2nd). Salt Lake City.ISBN 1-4499-6637-3 Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham. II (edisi ke-2nd). Salt Lake City.ISBN 1-4499-6638-1 Horrox, Rosemary (2004). Edward , second duke of York (c.1373–1415). Oxford Dictionary of National Biography. Diakses tanggal 18 October 2012.
Tait 1896, hlm. 403; Cokayne 1959, hlm. 903; Richardson I 2011, hlm. 365–8; Richardson II 2011, hlm. 211–12; Horrox 2004. Tait, James (1896). 'Plantagenet', Edward. 45. Dictionary of National Biography, 1885-1890. hlm. 401–4. Diakses tanggal 20 October 2012. Cokayne, George Edward (1959). The Complete Peerage, edited by Geoffrey H. White. XII(2). London: St. Catherine Press. Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham. I (edisi ke-2nd). Salt Lake City.ISBN 1-4499-6637-3 Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham. II (edisi ke-2nd). Salt Lake City.ISBN 1-4499-6638-1 Horrox, Rosemary (2004). Edward , second duke of York (c.1373–1415). Oxford Dictionary of National Biography. Diakses tanggal 18 October 2012.