Sani H, Ambiyar A, Sukardi S, Sari D. Development of Web-based Tuition Payment Information System Supported by Whatsapp Notifications. JTIP [Internet]. 29Mar.2023 [cited 18May2024];15(2):160-6. Available from: http://tip.ppj.unp.ac.id/index.php/tip/article/view/534