Paisley, I. R. K. (1972). The dagger of treachery strikes at the heart of Ulster. Puritan Press.
Lua i Stíl Chicago (17ú heag.)Paisley, Ian R. K. The Dagger of Treachery Strikes at the Heart of Ulster. [Belfast: Puritan Press, 1972.
Lua MLA (8ú heag.)Paisley, Ian R. K. The Dagger of Treachery Strikes at the Heart of Ulster. Puritan Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.