Fąk, Tadeusz, and Paulina Jarecka. “Attitudes and Entrepreneurship Behaviors of Students of Józef Piłsudski University of Physical Education in Warsaw”. Journal of Education, Health and Sport 7, no. 5 (May 30, 2017): 996–1003. Accessed June 29, 2025. https://apcz.umk.pl/JEHS/article/view/5533.