Irwin, M. (1951). Knock four times. Chatto & Windus.
芝加哥风格引文Irwin, Margaret. Knock Four Times. London: Chatto & Windus, 1951.
MLA引文Irwin, Margaret. Knock Four Times. Chatto & Windus, 1951.
警告：这些引文格式不一定是100％准确.
APA引文
Irwin, M. (1951). Knock four times. Chatto & Windus.
芝加哥风格引文Irwin, Margaret. Knock Four Times. London: Chatto & Windus, 1951.
MLA引文Irwin, Margaret. Knock Four Times. Chatto & Windus, 1951.