(2001). Tree-planting no defense against global warming? Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Tree-planting No Defense Against Global Warming?" Manila Bulletin 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Tree-planting No Defense Against Global Warming?" Manila Bulletin, 2001.
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