Iryana, Wahyu, and Muhamad Bisri Mustofa. “Communication of Haji Oemar Said Tjokroaminoto: Father of the Indonesian Nation (1905-1934)”. KnE Social Sciences 9, no. 12 (April 4, 2024): 545–563. Accessed July 17, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/15880.