Philippines. Bureau of Customs & Philippine Researcg Guide. Customs regulations and rulings. PRG.
Cita Chicago (17th ed.)Philippines. Bureau of Customs i Philippine Researcg Guide. Customs Regulations and Rulings. Quezon City: PRG.
Cita MLA (9th ed.)Philippines. Bureau of Customs i Philippine Researcg Guide. Customs Regulations and Rulings. PRG.
Atenció: Aquestes cites poden no estar 100% correctes.