Development Academy of the Philippines. (2007). How to develop project feasibility studies (Rev. ed.). Development Academy of the Philippines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDevelopment Academy of the Philippines. How to Develop Project Feasibility Studies. Rev. ed. Pasig City: Development Academy of the Philippines, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDevelopment Academy of the Philippines. How to Develop Project Feasibility Studies. Rev. ed. Development Academy of the Philippines, 2007.
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