Kowalewski, Michał. “The Role of Physical Activity in the Proper Development of a Child in Preschool Age”. Journal of Education, Health and Sport 10, no. 12 (December 29, 2020): 185–191. Accessed November 26, 2024. https://apcz.umk.pl/JEHS/article/view/JEHS.2020.10.12.018.