BNPB (9 November 2010). "Rekor Baru Letusan Merapi" (in Indonesian). Badan Koordinasi Nasional Penanganan Bencana-Indonesian Disaster Management Office. Archived from the original on 21 July 2011. Retrieved 9 November 2010.
BNPB (9 November 2010). "Rekor Baru Letusan Merapi" (in Indonesian). Badan Koordinasi Nasional Penanganan Bencana-Indonesian Disaster Management Office. Archived from the original on 21 July 2011. Retrieved 9 November 2010.