Widdowson, P. (1999). Literature. Routledge.
Lua i Stíl Chicago (17ú heag.)Widdowson, Peter. Literature. London ; New York: Routledge, 1999.
Lua MLA (8ú heag.)Widdowson, Peter. Literature. Routledge, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.