Devi Ariningsih, N. K., L. P. Artini, and N. P. E. Marsakawati. “The Effect of E-Portfolio in Project-Based Learning Toward Learner Autonomy and Writing Competency”. Journal of Education Research and Evaluation, vol. 5, no. 1, Jan. 2021, pp. 154-60, doi:10.23887/jere.v5i1.29982.