Philippines. Department of Tourism. National Ecotourism Steering Committee Ecotourism Technical Working Group. (2014). National ecotourism strategy 2013-2022. Department of Tourism.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Tourism. National Ecotourism Steering Committee Ecotourism Technical Working Group. National Ecotourism Strategy 2013-2022. [Manila]: Department of Tourism, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Tourism. National Ecotourism Steering Committee Ecotourism Technical Working Group. National Ecotourism Strategy 2013-2022. Department of Tourism, 2014.
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