F. M. Guiapal, A. M. . Usop, and J. D. . Lumbu-an, “Awareness and Acceptability of Pre-Certified Halal Foods to Non-Muslim Students among Secondary Schools”, Int. J. Multidiscip. Appl. Bus. Edu. Res., vol. 5, no. 7, pp. 2620–2635, Jul. 2024, doi: 10.11594/ijmaber.05.07.20.