BIELECKI, Jan. Zbigniew Tarkowski. Jąkanie. Studia Psychologica: Theoria et praxis, [S. l.], n. 2, p. 237–239, 2001. Disponível em: https://czasopisma.uksw.edu.pl/index.php/sp/article/view/2290. Acesso em: 7 dec. 2025.