Schultz, J. W. (1926). Signposts of adventure: Glacier national park as the Indians know it. Houghton Mifflin Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchultz, James Willard. Signposts of Adventure: Glacier National Park as the Indians Know It. Boston, New York: Houghton Mifflin Co., 1926.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSchultz, James Willard. Signposts of Adventure: Glacier National Park as the Indians Know It. Houghton Mifflin Co., 1926.
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