ZHU, Xinyu. Duolingo’s Digital Marketing Strategy Based on Gamified Consumer Psychology and Its Effectiveness. Finance & Economics, [S. l.], v. 4, n. 4, p. 10802, 2026. DOI: 10.61173/p4mzvd84. Disponível em: https://fe.deanfrancis.press/article/view/121. Acesso em: 4 nov. 2026.