Hill, I. (2004). Ursula, under: Novel (First edition.). Penguin books.
Lua i Stíl Chicago (17ú heag.)Hill, Ingrid. Ursula, Under: Novel. First edition. New York: Penguin books, 2004.
Lua MLA (9ú heag.)Hill, Ingrid. Ursula, Under: Novel. First edition. Penguin books, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.