Roe, J. (1997). North Cascades Highway: Washington's popular and scenic pass. Mountaineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoe, JoAnn. North Cascades Highway: Washington's Popular and Scenic Pass. Seattle, WA: Mountaineers, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoe, JoAnn. North Cascades Highway: Washington's Popular and Scenic Pass. Mountaineers, 1997.
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