United Nations. Statistical Office. (1964). Sample surveys of current interest.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations. Statistical Office. Sample Surveys of Current Interest. New York, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations. Statistical Office. Sample Surveys of Current Interest. 1964.
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