Ash, R. (2007). Whitaker's world of facts. Penguin Books.
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芝加哥风格引文
Ash, Russell. Whitaker's World of Facts. New Delhi: Penguin Books, 2007.
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MLA引文
Ash, Russell. Whitaker's World of Facts. Penguin Books, 2007.
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警告：这些引文格式不一定是100％准确.