References for Joan Countess Plantagenet * of Kent

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Sir B.Burke: Burke's Peerage and Baronetage. London, 1999
Sir B. Burke: A Genealogical History of the Dormant, abeyant, forfeited and extinct peerages of the British Empire. London, 1866
M.A.H., Marquis de Ruvigny: The Plantagenet roll of the blood royal, Essex Volume. London, Edinburgh, 1908
D.Schwennicke: Europäische Stammtafeln, Vol. II, Tafel 84. Marburg, 1984
F.L.Weis: Ancestral Roots of Sixty Colonists. 6th Ed., Baltimore, 1988