MIGUEL, Dalos D. et al. Language Mapping of the Cordillera Administrative Region Using Relational Model. International Journal of Computing Sciences Research, [S.l.], v. 8, p. 2841-2853, may 2024. ISSN 2546-115X. Available at: <//www.stepacademic.net/ijcsr/article/view/518>. Date accessed: 08 june 2025.