Lewis, C. S. (1982). The screwtape letters: With screwtape proposes a toast. Collier books.
芝加哥风格引文Lewis, C. S. The Screwtape Letters: With Screwtape Proposes a Toast. New York: Collier books, 1982.
MLA引文Lewis, C. S. The Screwtape Letters: With Screwtape Proposes a Toast. Collier books, 1982.
警告：这些引文格式不一定是100％准确.