Hendarti, H., Leonard, L., Thamrin, A., & Yohanes, Y. (2011). Evaluasi Sistem Informasi Penjualan dan Piutang Dagang pada PT. LMY. ComTech: Computer, Mathematics and Engineering Applications, 2(1), 99-105. https://doi.org/10.21512/comtech.v2i1.2720