International Geographical Congress ,23rd :1976 (Moscow, Russia). (1976). International geography '76. Distributed by Pergamon Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Geographical Congress ,23rd :1976 (Moscow, Russia). International Geography '76. Distributed by Pergamon Press, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रInternational Geographical Congress ,23rd :1976 (Moscow, Russia). International Geography '76. Distributed by Pergamon Press, 1976.
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