Deptuła, Maria, and Anna Borucka. “School Risk Factors in Developing a Sense of Competence by Polish Pupils: Their Fourth and Fifth Year of Learning at Primary School – Longitudinal Studies”. Przegląd Badań Edukacyjnych (Educational Studies Review) 2, no. 31 (December 30, 2020): 23–42. Accessed March 29, 2024. https://apcz.umk.pl/PBE/article/view/PBE.2020.017.