Mason, A. E. W. (1960). The watchers. Dent.
Lua i Stíl Chicago (17ú heag.)Mason, A. E. W. The Watchers. London: Dent, 1960.
Lua MLA (8ú heag.)Mason, A. E. W. The Watchers. Dent, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.