Sajise, P. E. (1992). Saving the present for the future: The state of the environment. U.P. Center for Integrative and Development Studies in cooperation with University of the Philippines Press.
Lua i Stíl Chicago (17ú heag.)Sajise, Percy E. Saving the Present for the Future: The State of the Environment. Quezon City: U.P. Center for Integrative and Development Studies in cooperation with University of the Philippines Press, 1992.
Lua MLA (9ú heag.)Sajise, Percy E. Saving the Present for the Future: The State of the Environment. U.P. Center for Integrative and Development Studies in cooperation with University of the Philippines Press, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.