Jusay, A. (2002). How five youngsters became full-fledged environmentalists. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)Jusay, Annalyn. "How Five Youngsters Became Full-fledged Environmentalists." Manila Bulletin 2002.
Citatione MLA (9a ed.)Jusay, Annalyn. "How Five Youngsters Became Full-fledged Environmentalists." Manila Bulletin, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.