Intercom. (1964). Focus on world population. Foreign Policy Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIntercom. Focus on World Population. [New York]: Foreign Policy Association, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIntercom. Focus on World Population. Foreign Policy Association, 1964.
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