B. Ambarita and S. Purba, “Model Development of Character Educational for the State University of Medan Students”, IJSBAR, vol. 30, no. 5, pp. 1–12, Dec. 2016, Accessed: Apr. 01, 2026. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/6489