"Proclamation No. 1268, s. 2007". Official Gazette of the Republic of the Philippines. April 10, 2007. Archived from the original on April 24, 2019. Retrieved October 11, 2019.
"Proclamation No. 1268, s. 2007". Official Gazette of the Republic of the Philippines. April 10, 2007. Archived from the original on April 24, 2019. Retrieved October 11, 2019.