Muhamad Trisno, and Hermansyah. “WEBSITE BASED PPOB SALES SYSTEM AND INTEGRATED WITH WHATSAPP GATEWAY CASE STUDY OF CREDIT COUNTER”. Jurnal Rekayasa Sistem Informasi dan Teknologi 3, no. 1 (August 8, 2025): 29–42. Accessed September 2, 2026. https://journal.ppmi.web.id/index.php/jrsit/article/view/2252.