Oktavia, M., J. Mujiyanto, H. Pratama, and D. A. L. Bharati. “Optimizing Digital Literacy in Teaching Grammar through E-Portfolio at STKIP Lampung in Indonesia”. International Conference on Science, Education, and Technology, vol. 7, no. 1, Mar. 2023, pp. 334-9, https://proceeding.unnes.ac.id/ISET/article/view/1979.