記錄引文
APA引文
Estados Unidos National Foreign Assessment Center. (1978). Polar regions. Central Intelligence Agency.
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Chicago Style (17th ed.) Citation
Estados Unidos National Foreign Assessment Center. Polar Regions. Central Intelligence Agency, 1978.
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MLA引文
Estados Unidos National Foreign Assessment Center. Polar Regions. Central Intelligence Agency, 1978.
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警告：這些引文格式不一定是100％准確.