Machiel Lamers & Edward Huijbens. (2018). Sustainable Tourism and Natural Resource Conservation in the Polar Regions. MDPI - Multidisciplinary Digital Publishing Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMachiel Lamers और Edward Huijbens. Sustainable Tourism and Natural Resource Conservation in the Polar Regions. MDPI - Multidisciplinary Digital Publishing Institute, 2018.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMachiel Lamers और Edward Huijbens. Sustainable Tourism and Natural Resource Conservation in the Polar Regions. MDPI - Multidisciplinary Digital Publishing Institute, 2018.
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