Hidayat, Tatang, and Udin Supriadi. “Comparative Study of Religious Understandings of Persatuan Umat Islam (PUI) and Al-Irsyad Al-Islamiyyah (Review of Similarities and Differences in Building Ukhuwah Islamiyah)”. Islam Realitas: Journal of Islamic and Social Studies, vol. 5, no. 2, Dec. 2019, pp. 186-01, doi:10.30983/islam_realitas.v5i2.2092.