"Inactive Volcanoes; Part 6". Philippine Institute of Volcanology and Seismology. July 30, 2008. Archived from the original on March 22, 2016. Retrieved March 24, 2016.
Leprozo, Dave Jr. (December 25, 2009). "Mapping out Mount Pulag". GMA News Online. Archived from the original on October 4, 2016. Retrieved October 4, 2016.
Dumlao, Artemio (December 29, 2015). "Mt. Pulag Freezes Below Zero". Philstar Global. Archived from the original on August 1, 2019. Retrieved August 6, 2019.
"Inactive Volcanoes; Part 6". Philippine Institute of Volcanology and Seismology. July 30, 2008. Archived from the original on March 22, 2016. Retrieved March 24, 2016.
Leprozo, Dave Jr. (December 25, 2009). "Mapping out Mount Pulag". GMA News Online. Archived from the original on October 4, 2016. Retrieved October 4, 2016.
Dumlao, Artemio (December 29, 2015). "Mt. Pulag Freezes Below Zero". Philstar Global. Archived from the original on August 1, 2019. Retrieved August 6, 2019.