University of the Philippines Diliman. National Institutes for Science and Mathematics Education Development, Agad, M. L., Mondigo, L., & Gamboa, R. N. (2012). Gaano kaligtas ang ating tubig? DZUP.
Chicago-referens (17:e uppl.)University of the Philippines Diliman. National Institutes for Science and Mathematics Education Development, Ma. Lourdes Agad, Lolita Mondigo, och Rodora N. Gamboa. Gaano Kaligtas Ang Ating Tubig? Quezon City: DZUP, 2012.
MLA-referens (9:e uppl.)University of the Philippines Diliman. National Institutes for Science and Mathematics Education Development, et al. Gaano Kaligtas Ang Ating Tubig? DZUP, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.