Lubis, F., Nasution, M. A., Fitri, A., Rizwinie, K. S., Sihaloho, J., Pasaribu, R. A. A., Salsabila, S. and Siregar, J. A. (2023) “Factors Influencing Students’ Difficulties in Using Formal Indonesian Language in The Campus Environment”, EDUCTUM: Journal Research, 2(6), pp. 155–158. doi: 10.56495/ejr.v2i6.405.