Philippines National Economic and Development Authority, Philippines. Department of Public Works, Transportation and Communications, Tahal Consulting Engineers, United Nations Development Programme in the Philippines, & Planning and Project Development Office. (1977). Pampanga Delta/Candaba Swamp Area Development Project: Primer. PPDO, DPWTC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines National Economic and Development Authority, Transportation and Communications Philippines. Department of Public Works, Tahal Consulting Engineers, United Nations Development Programme in the Philippines, و Planning and Project Development Office. Pampanga Delta/Candaba Swamp Area Development Project: Primer. Quezon City: PPDO, DPWTC, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines National Economic and Development Authority, et al. Pampanga Delta/Candaba Swamp Area Development Project: Primer. PPDO, DPWTC, 1977.