Empson, W. (1995). Seven types of ambiguity. Penguin Books in association with Chatto and Windus.
芝加哥风格引文Empson, William. Seven Types of Ambiguity. Harmondsworth, Middlesex: Penguin Books in association with Chatto and Windus, 1995.
MLA引文Empson, William. Seven Types of Ambiguity. Penguin Books in association with Chatto and Windus, 1995.
警告：这些引文格式不一定是100％准确.