WIDAWSKA-STANISZ, Agnieszka. Gamification in personnel management of sport – recreation service companies. Journal of Education, Health and Sport, [S. l.], v. 7, n. 5, p. 574–587, 2017. Disponível em: https://apcz.umk.pl/JEHS/article/view/4552. Acesso em: 28 jun. 2025.