Izza, N. N., and A. S. Rusydiana. “A Qualitative Review on Halal Food: NVivo Approach”. Proceedings of Femfest International Conference on Economics, Management, and Business, vol. 1, Mar. 2023, pp. 90-106, https://ejournal.unida.gontor.ac.id/index.php/FICCOMSS/article/view/10856.