Blake, N. (1963). The deadly joker. Collins for the Crime Club.
Lua i Stíl Chicago (17ú heag.)Blake, Nicholas. The Deadly Joker. London: Collins for the Crime Club, 1963.
Lua MLA (8ú heag.)Blake, Nicholas. The Deadly Joker. Collins for the Crime Club, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.