Witt, G. (2008). Ultimate adventures: A rough guide to adventure travel : [the world's best outdoor travel experiences]. Rough Guides : Distributed by the Penguin Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWitt, Greg. Ultimate Adventures: A Rough Guide to Adventure Travel : [the World's Best Outdoor Travel Experiences]. London ; New York: Rough Guides : Distributed by the Penguin Group, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWitt, Greg. Ultimate Adventures: A Rough Guide to Adventure Travel : [the World's Best Outdoor Travel Experiences]. Rough Guides : Distributed by the Penguin Group, 2008.
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