Navarro, R. C. (1991). The churches of Ilocos Norte: Treasures from Spain's colonial rule / Roberto C. Navarro. Manila Times.
Citazione stile Chigago Style (17a edizione)Navarro, Roberto C. "The Churches of Ilocos Norte: Treasures from Spain's Colonial Rule / Roberto C. Navarro." Manila Times 1991.
Citatione MLA (9a ed.)Navarro, Roberto C. "The Churches of Ilocos Norte: Treasures from Spain's Colonial Rule / Roberto C. Navarro." Manila Times, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.