Nykiel, Włodzimierz, and Małgorzata Sęk. The Charter of Taxpayer’s Rights: A New Instrument to Protect the Rights of the Polish Taxpayer. Law. Poland: Lodz University Press, 2022. Accessed January 22, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1183.