Philippines. Department of Public Works, Transportation and Communications, & Planning and Project Development Office. (1972). Pre-feasibility study: Marikina-Infanta road. PPDO.
Dyfyniad Arddull ChicagoPhilippines. Department of Public Works, Transportation and Communications, and Planning and Project Development Office. Pre-feasibility Study: Marikina-Infanta Road. Manila: PPDO, 1972.
Dyfyniad MLAPhilippines. Department of Public Works, Transportation and Communications, and Planning and Project Development Office. Pre-feasibility Study: Marikina-Infanta Road. PPDO, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.