MUVID, M. B.; ALIYAH, N. D. The Tasawuf Wasathiyah Concept in Central Flow of Industrial Revolution 4.0: (Study on the Thinking of Modern Sufism Hamka and Nasaruddin Umar). Tribakti: Jurnal Pemikiran Keislaman, v. 31, n. 1, p. 169-186, 13 Jan. 2020.