APA引文

Martin, W. (1975). Screwtape writes again. Vision House.

芝加哥风格引文

Martin, Walter. Screwtape Writes Again. Santa Ana: Vision House, 1975.

MLA引文

Martin, Walter. Screwtape Writes Again. Vision House, 1975.

警告：这些引文格式不一定是100％准确.