Morallos, C. P. (2003). Watchman of our borders: A brief history of the centennial of the Philippine Bureau of Customs 1902-2002. Penpower News Agency.
Citazione stile Chigago Style (17a edizione)Morallos, Chando P. Watchman of Our Borders: A Brief History of the Centennial of the Philippine Bureau of Customs 1902-2002. Manila: Penpower News Agency, 2003.
Citatione MLA (9a ed.)Morallos, Chando P. Watchman of Our Borders: A Brief History of the Centennial of the Philippine Bureau of Customs 1902-2002. Penpower News Agency, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.