Mckeon, P. R. (1978). Hincmar of laon and Carolingian politics. University of Illinois Press.
Chicago-viite (17. p.)Mckeon, Peter R. Hincmar of Laon and Carolingian Politics. Chicago: University of Illinois Press, 1978.
MLA-viite (9. p.)Mckeon, Peter R. Hincmar of Laon and Carolingian Politics. University of Illinois Press, 1978.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.