Liping Q, Anisah Abu Hassan S, Yiping X. The Impact of E-Portfolio Assessment Implementation on Polytechnic Students’ Speaking Proficiency and Self-Reflection on Learning Business English . TELL [Internet]. 2023 Nov. 6 [cited 2024 Jul. 22];11(2). Available from: https://journal.um-surabaya.ac.id/Tell/article/view/20676