↑ "Brief Profile". Province of Sulu, Philippines. คลังข้อมูลเก่า เก็บจาก แหล่งเดิม เมื่อ 26 February 2011. สืบค้นเมื่อ 18 April 2016. Various government agencies report varying land areas for Sulu. According to the National Mapping and Resources Information Authority, Sulu has a total land area of 160,040 hectares. On the other hand, based on the National Statistics Office (NSO) 2000 Demographic and Socio-Economic profile, the province has a land area of 1,754.6.
↑ Province of Sulu: Brief Profile (There seems to be major discrepancies among authoritative sources: 343,699 ha (NSCB 2007), 175,460 ha (NSCB 2000), 167,377 ha (NAMRIA))
