Mursid, Mursid, and La Hazani. “IMPLEMENTASI FORMULA HAVERSINE PADA SISTEM ABSENSI PEGAWAI BERBASIS WEB (STUDI KASUS: SMA ISLAM GUPPI KOTA SORONG)”. Jurnal Teknologi Informasi 12, no. 2 (February 1, 2025): 9-17. Accessed April 18, 2026. https://ojs.ustj.ac.id/jti/article/view/1468.