Philippines. Department of Public Works, Transportation and Communications, & Planning and Project Development Office. (1972). Pre-feasibility study: Marikina-Infanta road. PPDO.
芝加哥风格引文Philippines. Department of Public Works, Transportation and Communications, 与 Planning and Project Development Office. Pre-feasibility Study: Marikina-Infanta Road. Manila: PPDO, 1972.
MLA引文Philippines. Department of Public Works, Transportation and Communications, 与 Planning and Project Development Office. Pre-feasibility Study: Marikina-Infanta Road. PPDO, 1972.
警告：这些引文格式不一定是100％准确.