Balce, M. E. (2008). Teaching sustainable development to high school students. University of the Philippines, College of Education.
Lua i Stíl Chicago (17ú heag.)Balce, Marina E. Teaching Sustainable Development to High School Students. [Quezon City]: University of the Philippines, College of Education, 2008.
Lua MLA (9ú heag.)Balce, Marina E. Teaching Sustainable Development to High School Students. University of the Philippines, College of Education, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.