Obrien, D. e. (2008). Penguin yearbook 2009. Penguin Books.
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芝加哥风格引文
Obrien, Derek ed. Penguin Yearbook 2009. New Delhi: Penguin Books, 2008.
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MLA引文
Obrien, Derek ed. Penguin Yearbook 2009. Penguin Books, 2008.
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警告：这些引文格式不一定是100％准确.