De Viana, A. V. (2007). Mindanao in the Philippine Flag. Manila Bulletin.
Chicago Style (17th ed.) CitationDe Viana, Augusto V. "Mindanao in the Philippine Flag." Manila Bulletin 2007.
MLA (9th ed.) CitationDe Viana, Augusto V. "Mindanao in the Philippine Flag." Manila Bulletin, 2007.
Warning: These citations may not always be 100% accurate.