Supardi, E. ., and N. . Nurjanah. “Food Cost Analysis During Lockdown Based on Activity-Based Costing and Food Frequency Questionnaire Methods in Batununggal Village, Bandung City”. Proceedings of The International Halal Science and Technology Conference, vol. 14, no. 1, Mar. 2022, pp. 36-46, doi:10.31098/ihsatec.v14i1.484.