PurwantoE. H., AnggraeniP., DewantoroA., AnggundariW. C., and TampubolonB. D. “Recommendation of Affordable Halal Certification Fee”. Halal Studies and Society, Vol. 1, no. 2, May 2024, pp. 50-55, doi:10.29244/hass.1.2.50-55.