APA-referens (7:e uppl.)

Navarro, R. C. (1991). The churches of Ilocos Norte: Treasures from Spain's colonial rule / Roberto C. Navarro. Manila Times.

Chicago-referens (17:e uppl.)

Navarro, Roberto C. "The Churches of Ilocos Norte: Treasures from Spain's Colonial Rule / Roberto C. Navarro." Manila Times 1991.

MLA-referens (9:e uppl.)

Navarro, Roberto C. "The Churches of Ilocos Norte: Treasures from Spain's Colonial Rule / Roberto C. Navarro." Manila Times, 1991.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.