National Water Resources Council. (1981). Ilocos framework plan: Abra river basin. NWRC.
Chicago Style (17th ed.) CitationNational Water Resources Council. Ilocos Framework Plan: Abra River Basin. [Quezon City]: NWRC, 1981.
MLA (9th ed.) CitationNational Water Resources Council. Ilocos Framework Plan: Abra River Basin. NWRC, 1981.
Warning: These citations may not always be 100% accurate.