Powell, J. (1958). A stranger at your door. Bruce Pub. Co.
Lua i Stíl Chicago (17ú heag.)Powell, John. A Stranger at Your Door. Milwaukee: Bruce Pub. Co, 1958.
Lua MLA (8ú heag.)Powell, John. A Stranger at Your Door. Bruce Pub. Co, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.