Ridge, A. A., & Ridge, J. W. (2000). Introducing the Yellowstone Trail: A good road from Plymouth Rock to Puget Sound, 1912-1930. Yellowstone Trail Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRidge, Alice A., और John William Ridge. Introducing the Yellowstone Trail: A Good Road from Plymouth Rock to Puget Sound, 1912-1930. Altoona, Wis.: Yellowstone Trail Publishers, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRidge, Alice A., और John William Ridge. Introducing the Yellowstone Trail: A Good Road from Plymouth Rock to Puget Sound, 1912-1930. Yellowstone Trail Publishers, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.