Philippines National Historical Institute. (2006). The Flag and heraldic code of the Philippines illustrated: Rules and regulations implementing Republic Act No. 8491 (3rd ed.). National Historical Institute.
Citace podle Chicago (17th ed.)Philippines National Historical Institute. The Flag and Heraldic Code of the Philippines Illustrated: Rules and Regulations Implementing Republic Act No. 8491. 3rd ed. Manila: National Historical Institute, 2006.
Citace podle MLA (9th ed.)Philippines National Historical Institute. The Flag and Heraldic Code of the Philippines Illustrated: Rules and Regulations Implementing Republic Act No. 8491. 3rd ed. National Historical Institute, 2006.
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