Pag-iwayan, J. Building eco-friendly, sustainable play areas. Manila Bulletin.
Chicagoスタイル(17版)引用形式Pag-iwayan, Jessica. "Building Eco-friendly, Sustainable Play Areas." Manila Bulletin .
MLA(9版)引用形式Pag-iwayan, Jessica. "Building Eco-friendly, Sustainable Play Areas." Manila Bulletin, .
警告: この引用は必ずしも正確ではありません.