Cita APA (7th ed.)

Philippines. Department of Public Works, Transportation and Communications, & Planning and Project Development Office. (1972). Pre-feasibility study: Marikina-Infanta road. PPDO.

Cita Chicago (17th ed.)

Philippines. Department of Public Works, Transportation and Communications, i Planning and Project Development Office. Pre-feasibility Study: Marikina-Infanta Road. Manila: PPDO, 1972.

Cita MLA (9th ed.)

Philippines. Department of Public Works, Transportation and Communications, i Planning and Project Development Office. Pre-feasibility Study: Marikina-Infanta Road. PPDO, 1972.