Kuswardani, R., F. I. . Nur Abida, O. . Purwati, N. . Fauzia, D. B. . Darma, F. Fahri, N. . Chakim, and M. A. . Hilmi. “The Development of Portfolio Evaluation Tools to Improve Expository Writing Skills”. ELS Journal on Interdisciplinary Studies in Humanities, vol. 5, no. 2, June 2022, pp. 265-70, doi:10.34050/elsjish.v5i2.21186.