Nurazizah, Muslimat, and Hambali. “Analisis Penetapan Awal Bulan Ramadhan Serta Bulan Syawal: Perspektif Nahdatul Ulama Dan Muhammadiyah”. Al-Astar, vol. 5, no. 1, Apr. 2026, pp. 54-67, https://jurnal.staimempawah.ac.id/index.php/alastar/article/view/248.