Philippines. Department of Public Works, Transportation and Communications, Planning and Project Development Office, & Resource Allocation Department. (1975). Supplementary explanation to the paper on: Fuel and/or energy requirements of the ten-year infrastructure construction program. PPDO, DPWTC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. Department of Public Works, Transportation and Communications, Planning and Project Development Office, و Resource Allocation Department. Supplementary Explanation to the Paper on: Fuel And/or Energy Requirements of the Ten-year Infrastructure Construction Program. [Quezon City]: PPDO, DPWTC, 1975.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. Department of Public Works, Transportation and Communications, et al. Supplementary Explanation to the Paper on: Fuel And/or Energy Requirements of the Ten-year Infrastructure Construction Program. PPDO, DPWTC, 1975.