Darmawan, W., Sunardi, S., & Yudhana, A. (2020). Analysis of Mobile Based Activity Reporting Systems Using Usability Testing Methods and Use Questioners: Analysis of Mobile Based Activity Reporting Systems Using Usability Testing Methods and Use Questioners. Jurnal Mantik, 4(1), 69-73. Retrieved from https://iocscience.org/ejournal/index.php/mantik/article/view/679