Verhulst, A. E. (2002). The Carolingian economy. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Verhulst, Adriaan E. The Carolingian Economy. New York: Cambridge University Press, 2002.
Lua MLA (9ú heag.)Verhulst, Adriaan E. The Carolingian Economy. Cambridge University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.