Cita APA (7th ed.)

Karpinski, A. (1964). 20 twenty years of Poland's economic development, 1944-1964. Polonia Pub. House.

Cita Chicago (17th ed.)

Karpinski, Andrzej. 20 Twenty Years of Poland's Economic Development, 1944-1964. Warsaw: Polonia Pub. House, 1964.

Cita MLA (9th ed.)

Karpinski, Andrzej. 20 Twenty Years of Poland's Economic Development, 1944-1964. Polonia Pub. House, 1964.