Tan, M. C. (2006). Think green! act green!: Education for sustainable development. Philippine Population Review.
Chicago-referens (17:e uppl.)Tan, Merle C. "Think Green! Act Green!: Education for Sustainable Development." Philippine Population Review 2006.
MLA-referens (9:e uppl.)Tan, Merle C. "Think Green! Act Green!: Education for Sustainable Development." Philippine Population Review, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.