Lewis, C. S. (1982). The screwtape letters: With screwtape proposes a toast. Collier books.
Lua i Stíl Chicago (17ú heag.)Lewis, C. S. The Screwtape Letters: With Screwtape Proposes a Toast. New York: Collier books, 1982.
Lua MLA (9ú heag.)Lewis, C. S. The Screwtape Letters: With Screwtape Proposes a Toast. Collier books, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.