记录引文
APA引文
(1899). Map showing location and extent of the forest reserves and national parks in Western United States. U. S. Geological Survey.
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芝加哥风格引文
Map Showing Location and Extent of the Forest Reserves and National Parks in Western United States. U. S. Geological Survey, 1899.
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MLA引文
Map Showing Location and Extent of the Forest Reserves and National Parks in Western United States. U. S. Geological Survey, 1899.
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警告：这些引文格式不一定是100％准确.