APA (7 ম সংস্করণ) উদ্ধৃতি

Philippines. National Economic and Development Authority. Regional Development Council. (1985). Ilocos Sur development profile, CY 1985. National Economic and Development Authority.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Philippines. National Economic and Development Authority. Regional Development Council. Ilocos Sur Development Profile, CY 1985. San Fernando, La Union: National Economic and Development Authority, 1985.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Philippines. National Economic and Development Authority. Regional Development Council. Ilocos Sur Development Profile, CY 1985. National Economic and Development Authority, 1985.