Salma, S., and J. Jarudin. “Extraordinary Women: (Harmony of Ibadah and Aqidah in Inventing the Perfection of Ramadan at the Salat Empat Puluh in Sijunjung)”. ESENSIA: Jurnal Ilmu-Ilmu Ushuluddin, vol. 20, no. 1, Jan. 2020, pp. 61-72, doi:10.14421/esensia.v20i1.1775.