Drewnowski, J. (1970). Studies in the measurement of levels of living and welfare: I. Measuring social variables in real terms. II. The level of living index - new version. III. The level of welfare index. United Nations Research Institute for Social Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDrewnowski, Jan. Studies in the Measurement of Levels of Living and Welfare: I. Measuring Social Variables in Real Terms. II. The Level of Living Index - New Version. III. The Level of Welfare Index. Geneva: United Nations Research Institute for Social Development, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDrewnowski, Jan. Studies in the Measurement of Levels of Living and Welfare: I. Measuring Social Variables in Real Terms. II. The Level of Living Index - New Version. III. The Level of Welfare Index. United Nations Research Institute for Social Development, 1970.