Sorrell, P. (1979). Studies in the treatment of theme and its sources in some Old English narrative poems. University of Cambridge.
Lua i Stíl Chicago (17ú heag.)Sorrell, Paul. Studies in the Treatment of Theme and Its Sources in Some Old English Narrative Poems. University of Cambridge, 1979.
Lua MLA (8ú heag.)Sorrell, Paul. Studies in the Treatment of Theme and Its Sources in Some Old English Narrative Poems. University of Cambridge, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.