"China Offers Emergency Humanitarian Aid to Indonesia". PERMANENT MISSION OF THE PEOPLE'S REPUBLIC OF CHINA TO THE UNITED NATIONS OFFICE AT GENEVA AND OTHER INTERNATIONAL ORGANIZATIONS IN SWITZERLAND. 2 October 2009.
Department of Defense (22 October 2009). "DoD Bloggers Roundtable"(PDF). Department of Defense. Archived from the original(PDF) on 8 June 2011. Retrieved 21 January 2010.
Anthony Reid (2015). "History and Seismology in the Ring of Fire: Punctuating the Indonesian Past". In Henley, David; Nordholt, Henk Schulte (eds.). Environment, Trade and Society in Southeast Asia: A Longue Durée Perspective. Brill. pp. 62–77. JSTOR10.1163/j.ctt1w76vg1.8.
Department of Defense (22 October 2009). "DoD Bloggers Roundtable"(PDF). Department of Defense. Archived from the original(PDF) on 8 June 2011. Retrieved 21 January 2010.