Web-Based And Whatsapp Gateway Tuition Payment Information System (Case Study Of SMK Antartika 2 Sidoarjo): Sistem Informasi Pembayaran SPP Berbasis Web Dan WA Gateway (Studi Kasus : SMK Antartika 2 Sidoarjo). PELS [Internet]. 2023 July 28 [cited 2026 Oct. 23];4. Available from: https://pels.umsida.ac.id/index.php/PELS/article/view/1422