National Water Resources Council. (1980). Cagayan Valley framework plan: Chico River Basin. NWRC.
Citazione stile Chigago Style (17a edizione)National Water Resources Council. Cagayan Valley Framework Plan: Chico River Basin. Quezon City: NWRC, 1980.
Citatione MLA (9a ed.)National Water Resources Council. Cagayan Valley Framework Plan: Chico River Basin. NWRC, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.