El-Zastrouw, Ngatawi. “Menuju Sosiologi Nusantara: Analisa Sosiologis Ajaran Ki Ageng Suryomentaram Dan Amanat Galunggung”. Islam Nusantara: Journal for the Study of Islamic History and Culture, vol. 1, no. 1, July 2020, pp. 89-144, https://doi.org/10.47776/islamnusantara.v1i1.46.