Philippines. National Historical Institute. (1994). Historical markers: Regions V-XII. National Historical Institute.
Citazione stile Chigago Style (17a edizione)Philippines. National Historical Institute. Historical Markers: Regions V-XII. Manila: National Historical Institute, 1994.
Citatione MLA (9a ed.)Philippines. National Historical Institute. Historical Markers: Regions V-XII. National Historical Institute, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.