HUSSAIN, Ali; TING, Ding Hooi; MAZHAR, Muhammad. Why Purchase Premium in Freemium Online Games: The Self￿Determination Theory Perspective. KnE Social Sciences, [S. l.], v. 8, n. 20, p. 209– 221, 2023. DOI: 10.18502/kss.v8i20.14604. Disponível em: https://knepublishing.com/index.php/KnE-Social/article/view/14604. Acesso em: 15 jul. 2025.