Kaplan, M.N. and Zarkasyi, A.A. 2024. Purification of Sufism According to Hamka. Kalimah: Jurnal Studi Agama dan Pemikiran Islam. 22, 2 (Sep. 2024), 141–166. DOI:https://doi.org/10.21111/klm.v22i2.12909.