Mueller, T., Spring, B., Spring, I., & Mueller, M. (1968). Northwest ski trails ([1st ed.].). The Mountaineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMueller, Ted, Bob Spring, Ira Spring, और Marge Mueller. Northwest Ski Trails. [1st ed.]. Seattle: The Mountaineers, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMueller, Ted, et al. Northwest Ski Trails. [1st ed.]. The Mountaineers, 1968.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.