Shafer, R. 1. . . e. (1939). From Beowulf to Thomas Hardy. Doubleday, Doran & company, inc.
Lua i Stíl Chicago (17ú heag.)Shafer, Robert 1889- ed. From Beowulf to Thomas Hardy. New York city: Doubleday, Doran & company, inc, 1939.
Lua MLA (9ú heag.)Shafer, Robert 1889- ed. From Beowulf to Thomas Hardy. Doubleday, Doran & company, inc, 1939.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.