United Nations. Economic Commission for Europe, G. (1979). Labour supply and migration in Europe!: Demographic dimensions 1950-1975 and prospects. the author.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations. Economic Commission for Europe, Geneva. Labour Supply and Migration in Europe!: Demographic Dimensions 1950-1975 and Prospects. the author, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations. Economic Commission for Europe, Geneva. Labour Supply and Migration in Europe!: Demographic Dimensions 1950-1975 and Prospects. the author, 1979.
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