Philippines. Department of Science and Technology. Philippines Center for Advanced Science and Technology Research and Development. PCARRD Online: PCARRD home page.
Chicago-referens (17:e uppl.)Philippines. Department of Science and Technology. Philippines Center for Advanced Science and Technology Research and Development. PCARRD Online: PCARRD Home Page.
MLA-referens (9:e uppl.)Philippines. Department of Science and Technology. Philippines Center for Advanced Science and Technology Research and Development. PCARRD Online: PCARRD Home Page.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.