Smith, W. J. (1954). The mystery of Knock. Paulist Press.
Lua i Stíl Chicago (17ú heag.)Smith, William J. The Mystery of Knock. New York: Paulist Press, 1954.
Lua MLA (8ú heag.)Smith, William J. The Mystery of Knock. Paulist Press, 1954.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.