Philippines. Department of Natural Resources. (1979). The green machine: A primer on our forest resources. DNR.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Natural Resources. The Green Machine: A Primer on Our Forest Resources. Quezon City: DNR, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Natural Resources. The Green Machine: A Primer on Our Forest Resources. DNR, 1979.
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