Philippines. National Historical Institute. (2006). The flag and heraldic code of the Philippines illustrated: Rules and regulations implementing Republic Act No. 8491 (Third edition.). National Historical Institute.
Chicago Style (17th ed.) CitationPhilippines. National Historical Institute. The Flag and Heraldic Code of the Philippines Illustrated: Rules and Regulations Implementing Republic Act No. 8491. Third edition. Manila: National Historical Institute, 2006.
MLA (9th ed.) CitationPhilippines. National Historical Institute. The Flag and Heraldic Code of the Philippines Illustrated: Rules and Regulations Implementing Republic Act No. 8491. Third edition. National Historical Institute, 2006.
Warning: These citations may not always be 100% accurate.