Empson, W. (1947). Seven types of ambiguity. Chatto and Windus.
Lua i Stíl Chicago (17ú heag.)Empson, William. Seven Types of Ambiguity. London: Chatto and Windus, 1947.
Lua MLA (9ú heag.)Empson, William. Seven Types of Ambiguity. Chatto and Windus, 1947.
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