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

Thibaut l'Ancien, Thibaut le Tricheur and Luitgarde de Vermandois in Descendancy of Adam, pgs. 623 and 696

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

Liutgarde de Vermandois and Thibaut le Tricheur in Tableaux Genealogiques de la Maison Royale de France, pg. 69-71

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

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

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

Counts of Vermandois in Ataviae Regiae, pg. 43-44

Children of Herbert II de Vermandois in Abrege Chronologique des Grands Fiefs, pg. 11

Counts of Blois in Ataviae Regiae, pg. 28

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

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

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

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

Pedigree of Leutgard de Vermandois in Descendany of Adam, pg. 4049

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

Herbert II, Leutgard and Alix de Vermandois in Les Carlovingiens et la France, Vol. II, pgs. 60-61 and 80

Family of Herbert II de Vermandois in Descendancy of Adam, pgs. 622-626