“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, vol. 4, July 2023, doi: 10.21070/pels.v4i0.1422.