Batubara, S. H., S. A. Maulana, W. A. Harahap, and D. Y. Niska. “Decision Support System for Determining Tutoring Institutions for SNBT Preparation Using the Weighted Product Method”. Journal of Computer Science Advancements, vol. 2, no. 2, July 2024, pp. 99-113, doi:10.70177/jsca.v2i2.1108.