Akmal Tarigan, A., Nurhayati, N., & Syukri Albani Nasution, M. (2020). The Network of Ulama and its Role in The Development of Islam in North Sumatra. Religió Jurnal Studi Agama-Agama, 10(2), 209–228. https://doi.org/10.15642/religio.v10i2.1337