LIU, Yuqing. The Dual Nature of Motivation: Intrinsic and Extrinsic Drivers in Second Language Learning. Transactions on Social Science, Education and Humanities Research, London, U.K., v. 11, p. 710–714, 2024. DOI: 10.62051/yggb6c12. Disponível em: https://wepub.org/index.php/TSSEHR/article/view/2775. Acesso em: 17 dec. 2025.