Mubarraq, M. K., I. Ismail, and L. . Ukhti. “: Legal Pluralism in Determining the Start of Ramadan: The Authority of the Book Matla’ul Badrayn As ‘Living Law’ in Indonesian Society”. QISTHOSIA : Jurnal Syariah Dan Hukum, vol. 7, no. 1, June 2026, pp. 1-12, doi:10.46870/jhki.v7i1.2121.