Devi Ristyana Puji Lestari, et al. “Inıtıal Needs Analysıs Development Of Image Letter Card Medıa Based Dıgıtal Barcode For Elementary School”. Jurnal Elementaria Edukasia, vol. 8, no. 1, Mar. 2025, pp. 3606-17, doi:10.31949/jee.v8i1.12686.