Singer, H. W. (1982). Technologies for basic needs (Second edition.). International Labour Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSinger, H. W. Technologies for Basic Needs. Second edition. Geneva: International Labour Office, 1982.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSinger, H. W. Technologies for Basic Needs. Second edition. International Labour Office, 1982.
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