Yusuf, Ahmad Sholahuddin. “Ruwahan Tradition Among NU Communities of Javanese and Betawi Ethnic Groups Prior to Ramadan”. Journal of Nahdlatul Ulama Studies 4, no. 2 (August 30, 2023): 99–108. Accessed August 2, 2026. https://jnus.lakpesdamsalatiga.or.id/index.php/jnus/article/view/53.