Raden Abdulkadir Widjojoatmodjo. Islam in the Netherlands East Indies. The Far Eastern Quarterly. November 1942, 2 (1): 48–57. JSTOR 2049278. doi:10.2307/2049278.
Raden Abdulkadir Widjojoatmodjo. Islam in the Netherlands East Indies. The Far Eastern Quarterly. November 1942, 2 (1): 48–57. JSTOR 2049278. doi:10.2307/2049278.