"List of Provinces". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Diakses tanggal 24 January 2013.
"Region: REGION V (Bicol Region)". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Diarsipkan dari versi asli tanggal 2012-11-14. Diakses tanggal 24 January 2013.
"Region: REGION V (Bicol Region)". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Diarsipkan dari versi asli tanggal 2012-11-14. Diakses tanggal 24 January 2013.