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.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (9ú heag.)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.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.