Atienza, M. E. L. (2019). Chronology of the 1987 Philippine Constitution. University of the Philippines Center for Integrative and Development Studies.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিAtienza, Maria Ela L. Chronology of the 1987 Philippine Constitution. Diliman, Quezon City: University of the Philippines Center for Integrative and Development Studies, 2019.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিAtienza, Maria Ela L. Chronology of the 1987 Philippine Constitution. University of the Philippines Center for Integrative and Development Studies, 2019.
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