Bergson, A. (1989). Planning and performance in socialist economies: The USSR and Eastern Europe. Unwin Hyman.
Lua i Stíl Chicago (17ú heag.)Bergson, Abram. Planning and Performance in Socialist Economies: The USSR and Eastern Europe. Boston: Unwin Hyman, 1989.
Lua MLA (9ú heag.)Bergson, Abram. Planning and Performance in Socialist Economies: The USSR and Eastern Europe. Unwin Hyman, 1989.
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