LIPING, Qiao; ANISAH ABU HASSAN, Salmah; YIPING, Xu. The Impact of E-Portfolio Assessment Implementation on Polytechnic Students’ Speaking Proficiency and Self-Reflection on Learning Business English . Tell : Teaching of English Language and Literature Journal, [S. l.], v. 11, n. 2, 2023. DOI: 10.30651/tell.v11i2.20676. Disponível em: https://journal.um-surabaya.ac.id/Tell/article/view/20676. Acesso em: 22 jul. 2024.