Fernandez, R. A. (2013). The nature wonders nurtured by Palawan's underground river. Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFernandez, Rudy A. "The Nature Wonders Nurtured by Palawan's Underground River." Agriculture 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFernandez, Rudy A. "The Nature Wonders Nurtured by Palawan's Underground River." Agriculture, 2013.
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