JOPPKE, C. . Narodziny nabytego obywatelstwa. Studia Paedagogica Ignatiana, [S. l.], v. 25, n. 1, p. 135–154, 2022. DOI: 10.12775/SPI.2022.1.007. Disponível em: https://apcz.umk.pl/SPI/article/view/36545. Acesso em: 19 kwi. 2024.