Aquino, J. D. ., G. . Trumata, J. L. . Lantoria, E. N. . Cunanan, J. A. . Tecson, and M. . Bahana. “Proposed Miniature of Observatory in Palauig, Zambales”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 2, no. 1, Apr. 2020, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/1810.