Lubis, L., N. Daulay, and Z. Zainuddin. “Improving Student Achievement Through Group Guidance Services With Self-Management Techniques”. Nidhomul Haq : Jurnal Manajemen Pendidikan Islam, Vol. 7, no. 2, July 2022, pp. 201-16, doi:10.31538/ndh.v7i2.2031.