"Municipalities". Quezon City, Philippines: Department of the Interior and Local Government. Archived from the original on 25 January 2013. Retrieved 20 February 2013.
nscb.gov.ph
"Province: Sorsogon". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Archived from the original on 14 November 2012. Retrieved 20 February 2013.
web.archive.org
"Province: Sorsogon". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Archived from the original on 14 November 2012. Retrieved 20 February 2013.
"Municipalities". Quezon City, Philippines: Department of the Interior and Local Government. Archived from the original on 25 January 2013. Retrieved 20 February 2013.