Coba jelasin Rujukan dari Godefroy dari Bouillon dong

(abridged version: The First Crusade, Cambridge (1980), )

Murray, Alan V., "The Army of Godfrey of Bouillon, 1096–1099: Structure and Dynamics of a Contingent on the First Crusade" (PDF) , Revue belge de philologie et d'histoire 70 (2), 1992

Barker, Ernest (1911). "Godfrey of Bouillon". In Chisholm, Hugh (ed.). Encyclopædia Britannica. 12. (11th ed.). Cambridge University Press. pp. 172–173.

Bréhier, Louis René (1909). "Godfrey of Bouillon". In Catholic Encyclopedia. 6. New York: Robert Appleton Company.