Hakim, M. F. ., Nuha, A. S. ., Lathifah, W. A. ., & Yaqin, M. A. . (2020). Calculation of Unit Cost School Information System Development using ABC (Activity Based Costing) Method. Proceeding International Conference on Science and Engineering, 3, 307–313. https://doi.org/10.14421/icse.v3.518