Philippines. Department of Science and Technology. Philippines Center for Advanced Science and Technology Research and Development. PCARRD Online: PCARRD home page.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPhilippines. Department of Science and Technology. Philippines Center for Advanced Science and Technology Research and Development. PCARRD Online: PCARRD Home Page.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিPhilippines. Department of Science and Technology. Philippines Center for Advanced Science and Technology Research and Development. PCARRD Online: PCARRD Home Page.
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