Follett Ken. (1979). Eye of the Needle. A Signet Book, Penguin Group.
Lua i Stíl Chicago (17ú heag.)Follett Ken. Eye of the Needle. NewYork: A Signet Book, Penguin Group, 1979.
Lua MLA (9ú heag.)Follett Ken. Eye of the Needle. A Signet Book, Penguin Group, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.