DEPTUŁA, Maria and BORUCKA, Anna. 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). Online. 30 December 2020. Vol. 2, no. 31, pp. 23-42. [Accessed 19 August 2024]. DOI 10.12775/PBE.2020.017.