Lambert, o. A., & Shopkow, L. (2001). The history of the counts of Guines and Lords of Ardres. University of Pennsylvania Press.

Lambert, of Ardres, and Leah Shopkow. The History of the Counts of Guines and Lords of Ardres. Philadelphia [Pa.]: University of Pennsylvania Press, 2001.

Lambert, of Ardres, and Leah Shopkow. The History of the Counts of Guines and Lords of Ardres. University of Pennsylvania Press, 2001.