Bergson, A. (1989). Planning and performance in socialist economies: The USSR and Eastern Europe. Unwin Hymar.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBergson, Abram. Planning and Performance in Socialist Economies: The USSR and Eastern Europe. Unwin Hymar, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBergson, Abram. Planning and Performance in Socialist Economies: The USSR and Eastern Europe. Unwin Hymar, 1989.
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