Amin, Shodiqul, and Susi Ambarwati. “The Concept of Dzikir by Abdul Rauf Singkel in the Tanbih Al-Masyi Book”. AJIS: Academic Journal of Islamic Studies, vol. 5, no. 1, June 2020, pp. 69-80, doi:10.29240/ajis.v5i1.1379.