De Leon, H. S. (1999). Textbook on the Philippine Constitution (1999 ed.). Rex Book Store.
Chicago Style (17th ed.) CitationDe Leon, Hector S. Textbook on the Philippine Constitution. 1999 ed. Manila: Rex Book Store, 1999.
MLA (9th ed.) CitationDe Leon, Hector S. Textbook on the Philippine Constitution. 1999 ed. Rex Book Store, 1999.
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