CIAK, Jolanta Maria and GRUSZCZYŃSKA, Agnieszka. Goods and services tax in the tax systems of selected countries of the European Union: a case study. Ekonomia i Prawo. Economics and Law. Online. 30 September 2019. Vol. 18, no. 3, pp. 269-282. [Accessed 5 July 2025]. DOI 10.12775/EiP.2019.019.