Rahman Ghifari, Fathur, and Ading Kusdiana. “Contesting Sarekat Islam in Java, 1917–1927: Elite Strategies, Communist Penetration, and the Fragmentation of an Anticolonial Movement”. Jurnal Kawasan Sejarah, vol. 4, no. 1, Nov. 2026, pp. 196-1, https://journal.uinsgd.ac.id/index.php/jks/article/view/60425.