Harahap, S.Z., Munandar, M.H., Masrizal, Munthe, I.R. and Siregar, M.P.P. 2020. Implementation of C4.5 Agorithm in predicting the timeliness of student graduation (Case Study: Informatics Management Study Program, Labuhanbatu University). Jurnal Mantik. 4, 3 (Nov. 2020), 2041-2048. DOI:https://doi.org/10.35335/mantik.Vol4.2020.1064.pp2041-2048.