Philippines & Philippines. National Historical Institute. (2008). The Flag and Heraldic code of the Philippines illustrated: Rules and regulations implementing Republic Act No. 8491 (4th ed.). National Historical Institute.
Cita Chicago (17th ed.)Philippines i Philippines. National Historical Institute. The Flag and Heraldic Code of the Philippines Illustrated: Rules and Regulations Implementing Republic Act No. 8491. 4th ed. Manila: National Historical Institute, 2008.
Cita MLA (9th ed.)Philippines i Philippines. National Historical Institute. The Flag and Heraldic Code of the Philippines Illustrated: Rules and Regulations Implementing Republic Act No. 8491. 4th ed. National Historical Institute, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.