APA (7e ed.) Bronvermelding

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.

Chicago (17e ed.) Bronvermelding

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.

MLA (9e ed.) Bronvermelding

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.