Quimpo, D. (2013). Looking through the Philippine hawk owl. The Sunday Times.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रQuimpo, David. "Looking Through the Philippine Hawk Owl." The Sunday Times 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रQuimpo, David. "Looking Through the Philippine Hawk Owl." The Sunday Times, 2013.
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