APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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