(1991). Feasibility study for Kabulnan irrigation and area development project. National Irrigation Administration.
Citazione stile Chigago Style (17a edizione)Feasibility Study for Kabulnan Irrigation and Area Development Project. Philippines: National Irrigation Administration, 1991.
Citatione MLA (9a ed.)Feasibility Study for Kabulnan Irrigation and Area Development Project. National Irrigation Administration, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.