Philippines. National Economic and Development Authority. Regional Development Council. (1985). Abra development profile, CY 1985. NEDA.
Citazione stile Chigago Style (17a edizione)Philippines. National Economic and Development Authority. Regional Development Council. Abra Development Profile, CY 1985. San Fernando, La Union: NEDA, 1985.
Citatione MLA (9a ed.)Philippines. National Economic and Development Authority. Regional Development Council. Abra Development Profile, CY 1985. NEDA, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.