NOWAK, Paweł Fryderyk; CHALIMONIUK-NOWAK, Marta. Wybrane aspekty pracy zawodowej instruktorów fitness = Chosen aspects of professional work of fitness instructors. Journal of Education, Health and Sport, [S. l.], v. 6, n. 5, p. 298–315, 2016. Disponível em: https://apcz.umk.pl/JEHS/article/view/3527. Acesso em: 27 jan. 2025.