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Bruinessen, Martin (January 1, 1994). "Najmuddin al-Kubra, Jumadil Kubra and Jamaluddin al-Akbar; Traces of Kubrowiya influence in early Indonesian islam". Bijdragen tot de Taal-, Land- en Volkenkunde. 150 (2): 305–329. doi:10.1163/22134379-90003084. hdl:1874/20530. ISSN0006-2294.
indonesiacultures.com
"Sunan Ngudung". IndonesiaCultures.Com. September 1, 2011. Retrieved March 8, 2013.
Bruinessen, Martin (January 1, 1994). "Najmuddin al-Kubra, Jumadil Kubra and Jamaluddin al-Akbar; Traces of Kubrowiya influence in early Indonesian islam". Bijdragen tot de Taal-, Land- en Volkenkunde. 150 (2): 305–329. doi:10.1163/22134379-90003084. hdl:1874/20530. ISSN0006-2294.
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Agus Sunyoto
[1], Discussion of Atlas Walisongo with Habib Anis Sholeh Ba'asyin & KH. Mustofa Bisri.