记录引文
APA引文
Estados Unidos Geological Survey. (19). Map of copper range of Michigan. U. S. Geological Survey.
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芝加哥风格引文
Estados Unidos Geological Survey. Map of Copper Range of Michigan. U. S. Geological Survey, 19.
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MLA引文
Estados Unidos Geological Survey. Map of Copper Range of Michigan. U. S. Geological Survey, 19.
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警告：这些引文格式不一定是100％准确.