Vermandois Pedigree in Genealogical Tables Illustrative of Modern History, Table XXV

Thibaut le Tricheur and Liutgarde de Vermandois in Chrysler - Forker and Allied Families, pg. 189-190

Cathédrale Notre-Dame de Rouen. Photo added to Find a Grave by J.Sullivan on 30 June 2009.

Cathédrale Notre-Dame de Rouen. Photo added to Find a Grave by J.Sullivan on 30 June 2009.

Thibaud l'Ancien and Thibaut le Tricheur in The Ancestral Families of Hazel Ruth Keyes, pg. 151

Dukes of Normandy in Ataviae Regiae, pg. 65

Cathédrale Notre-Dame de Rouen. Photo added to Find a Grave by Gunny Obos on 29 October 2014.

Thibaut l'Ancien, Thibaut le Tricheur and Liutgarde de Vermandois in Johnson - Stedman and Allied Families, pg. 85

Blois Pedigree in The Empire and the Papacy, pg. 279

Thibaud l'Ancien and Thibaud le Tricheur in Histoire du Diocese et de la Ville de Chartres, pg. 104-105

Thibaut le Tricheur, his father Thibaut and mother Richilde in Histoire des Ducs et Comtes de Champagne, pg. 68-71

Thibaut l'Ancien and Thibaut le Tricheur in The Ancestry of Donald Macomber, Ethel Jaynes Macomber and Harriet Seaver Macomber, pg. 28

Thibaut le Tricheur in The History of Normandy and of England, Vol. II, pgs. 168, 171, 231-232

Rollo, Poppa of Bayeux and William Long Sword in Medieval English Ancestors of Certain Americans, pg. 181-183

Liutgarde de Vermandois and Thibaut le Tricheur in Dow, Ball, Eaton and Allied Families, pg. 289

Thibaud l'Ancien and Thibuat le Tricheur in Widner - Dunton - Elkins - Broomall and Allied Families, pg. 564-565