BAJAK, Monika. Selected Determinants of Children’s Helpfulness at the Early School Age on the Basis of Selected Schools in Myslenice County (Poland). Journal of Vasyl Stefanyk Precarpathian National University, [S. l.], v. 5, n. 1, p. 162–167, 2018. DOI: 10.15330/jpnu.5.1.162-167. Disponível em: https://journals.pnu.edu.ua/index.php/jpnu/article/view/3549. Acesso em: 20 jun. 2024.