Indra Ava Dianta, Agustinus Budi Santoso dan Muh Sabiq 2024. UTILIZING WHATSAPP API FOR SCHOOL PAYMENT SYSTEM IMPLEMENTATION WITH CODEIGNITER. JURNAL TEKNOLOGI INFORMASI DAN KOMUNIKASI. 15, 1 (Mar 2024), 168 - 177. DOI:https://doi.org/10.51903/jtikp.v15i1.844.