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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreen Umbrella Ltd, et al. Galileo's Battle for the Heavens. [Boston]: WGBH Boston Video, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGreen Umbrella Ltd, et al. Galileo's Battle for the Heavens. WGBH Boston Video, 2006.
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