Volken, M., Schell, S., & Wheeler, M. (2025). Backcountry skiing: Skills for ski touring and ski mountaineering (Second edition.). Mountaineers Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVolken, Martin, Scott Schell, और Margaret Wheeler. Backcountry Skiing: Skills for Ski Touring and Ski Mountaineering. Second edition. Seattle, WA: Mountaineers Books, 2025.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVolken, Martin, et al. Backcountry Skiing: Skills for Ski Touring and Ski Mountaineering. Second edition. Mountaineers Books, 2025.
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