Ismail, R. ., M. . Makhtar, H. . Hasan, A. R. Mamat, and L. . Patria. “Ontology Model for Hajj Using Ontology Development 101 Methodology”. Journal of Advanced Research Design, vol. 141, no. 1, Aug. 2025, pp. 241-56, doi:10.37934/ard.141.1.241256.