Collins & Univesity of Birmingham. (1990). Collins COBUILD English grammar. Collins.
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芝加哥风格引文
Collins & Univesity of Birmingham. Collins COBUILD English Grammar. London: Collins, 1990.
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MLA引文
Collins & Univesity of Birmingham. Collins COBUILD English Grammar. Collins, 1990.
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警告：这些引文格式不一定是100％准确.