St. Muriati, S. M., Dipalaya, T., Firmansyah, F., & Suwito, A. W. (2021). PGSD STUDENT PLAGIARISM RATE THROUGH PORTFOLIO TRELLO-BASED . KLASIKAL : JOURNAL OF EDUCATION, LANGUAGE TEACHING AND SCIENCE, 3(3), 63–71. https://doi.org/10.52208/klasikal.v3i3.108