Wulf, L. d., & Sokol, J. B. (2005). Customs modernization handbook. World Bank.
Chicago-čujuhus (17. p.)Wulf, Luc de, juo José B. Sokol. Customs Modernization Handbook. Washington, DC: World Bank, 2005.
MLA-čujuhus (9. p.)Wulf, Luc de, juo José B. Sokol. Customs Modernization Handbook. World Bank, 2005.
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