National Water Resources Council. (1980). Cagayan Valley framework plan: Abulog River Basins. NWRC.
芝加哥风格引文National Water Resources Council. Cagayan Valley Framework Plan: Abulog River Basins. Quezon City: NWRC, 1980.
MLA引文National Water Resources Council. Cagayan Valley Framework Plan: Abulog River Basins. NWRC, 1980.
警告：这些引文格式不一定是100％准确.