Karpinski, A. (1964). 20 twenty years of Poland's economic development, 1944-1964. Polonia Pub. House.
Chicago-čujuhus (17. p.)Karpinski, Andrzej. 20 Twenty Years of Poland's Economic Development, 1944-1964. Warsaw: Polonia Pub. House, 1964.
MLA-čujuhus (9. p.)Karpinski, Andrzej. 20 Twenty Years of Poland's Economic Development, 1944-1964. Polonia Pub. House, 1964.
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