HAN, H. Design and Implementation of Web-Based English Autonomous Learning System. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 14, n. 06, p. pp. 18–26, 2019. DOI: 10.3991/ijet.v14i06.9718. Disponível em: https://online-journals.org/index.php/i-jet/article/view/9718. Acesso em: 16 jan. 2022.