Tan, M. C. (2006). Think green! act green!: Education for sustainable development. Philippine Population Review.
Citace podle Chicago (17th ed.)Tan, Merle C. "Think Green! Act Green!: Education for Sustainable Development." Philippine Population Review 2006.
Citace podle MLA (9th ed.)Tan, Merle C. "Think Green! Act Green!: Education for Sustainable Development." Philippine Population Review, 2006.
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