Erdmann, P. (1990). Discourse and grammar: Focussing and defocussing in English. M. Niemeyer.
Tohutoru Kātū Chicago (17th ed.)Erdmann, Peter. Discourse and Grammar: Focussing and Defocussing in English. Tübingen: M. Niemeyer, 1990.
Tohutoro MLA (9th ed.)Erdmann, Peter. Discourse and Grammar: Focussing and Defocussing in English. M. Niemeyer, 1990.
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