Mohamed Meerasahibu, D. M. . . “Some Early Definitions of Taṣawwuf: Exploring the Centrality of Abū Yazīd Al-Bisṭāmi in Its History”. Afkar: Jurnal Akidah Dan Pemikiran Islam, vol. 23, no. 1, June 2021, pp. 197-50, doi:10.22452/afkar.vol23no1.6.