Mckeon, P. R. (1978). Hincmar of laon and Carolingian politics. University of Illinois Press.
Lua i Stíl Chicago (17ú heag.)Mckeon, Peter R. Hincmar of Laon and Carolingian Politics. Chicago: University of Illinois Press, 1978.
Lua MLA (9ú heag.)Mckeon, Peter R. Hincmar of Laon and Carolingian Politics. University of Illinois Press, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.