Strayer, J. R. (1974). Western Europe in the middle ages: A short history (2nd. ed.). Goodyear Publishing Company.
Lua i Stíl Chicago (17ú heag.)Strayer, Joseph R. Western Europe in the Middle Ages: A Short History. 2nd. ed. California: Goodyear Publishing Company, 1974.
Lua MLA (9ú heag.)Strayer, Joseph R. Western Europe in the Middle Ages: A Short History. 2nd. ed. Goodyear Publishing Company, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.