Blair, Emma Helen; Robertson, James Alexander; Bourne, Edward Gaylord (1903). The Philippine Islands, 1493–1803. Vol. 5 (1582–1583). The Arthur H. Clark Company. Archived from the original on June 4, 2024. Retrieved June 4, 2024.
Blair, Emma Helen; Robertson, James Alexander; Bourne, Edward Gaylord (1903). The Philippine Islands, 1493–1803. Vol. 5 (1582–1583). The Arthur H. Clark Company. Archived from the original on June 4, 2024. Retrieved June 4, 2024.
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The Kanlaon Volcano unrest, 10 August-14 October 1996. Philippine Institute of Volcanology and Seismology. OCLC793843148.