Competition Review. (2011). General Knowledge year book 2011. Competition Review Pvt. Ltd.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCompetition Review. General Knowledge Year Book 2011. New Delhi: Competition Review Pvt. Ltd, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCompetition Review. General Knowledge Year Book 2011. Competition Review Pvt. Ltd, 2011.
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