"Socio-Economic and Physical Profile"(PDF). The 2018-2027 Comprehensive Land Use Plan. Municipality of Kalayaan. p. 7. Archived(PDF) from the original on 2022-10-15. Retrieved 2022-10-15.
"Republic Act No. 9522". Official Gazette of the Republic of the Philippines. 10 March 2009. Archived from the original on 14 August 2018. Retrieved 14 May 2019.
China Sea pilot, Volume 1 (8th ed.). Taunton: UKHO - United Kingdom Hydrographic Office. 2010. Archived from the original on 2014-03-21. Retrieved 2014-06-26.
"Socio-Economic and Physical Profile"(PDF). The 2018-2027 Comprehensive Land Use Plan. Municipality of Kalayaan. p. 7. Archived(PDF) from the original on 2022-10-15. Retrieved 2022-10-15.
China Sea pilot, Volume 1 (8th ed.). Taunton: UKHO - United Kingdom Hydrographic Office. 2010. Archived from the original on 2014-03-21. Retrieved 2014-06-26.
"PD 1596". Pasig, Philippines: Chan Robles Virtual Law Library. Archived from the original on 26 October 2013. Retrieved 17 August 2013.
"Republic Act No. 9522". Official Gazette of the Republic of the Philippines. 10 March 2009. Archived from the original on 14 August 2018. Retrieved 14 May 2019.