ebrary, Inc, & Hoyt, R. S. (1968). Life and thought in the early Middle Ages. University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, agus Robert S. Hoyt. Life and Thought in the Early Middle Ages. Minneapolis: University of Minnesota Press, 1968.
Lua MLA (9ú heag.)ebrary, Inc, agus Robert S. Hoyt. Life and Thought in the Early Middle Ages. University of Minnesota Press, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.