Rohani, S., Junita, J. and Anjar, A. 2024. The Role of the Principal as a Supervisor in Increasing the Effectiveness of Administrative Services at SMP Negeri 1 Bilah Hulu. Jurnal Riset Ilmu Pendidikan. 4, 4 (Dec. 2024), 201–209. DOI:https://doi.org/10.56495/jrip.v4i4.818.