ebrary, Inc, Blair, R., & Bracksieck, G. (2011). The eastern San Juan Mountains: Their geology, ecology, and human history. University Press of Colorado : Mountain Studies Institute/San Juan Collaboratory.
Chicago-referens (17:e uppl.)ebrary, Inc, Rob Blair, och George Bracksieck. The Eastern San Juan Mountains: Their Geology, Ecology, and Human History. Boulder, Colo.: University Press of Colorado : Mountain Studies Institute/San Juan Collaboratory, 2011.
MLA-referens (9:e uppl.)ebrary, Inc, et al. The Eastern San Juan Mountains: Their Geology, Ecology, and Human History. University Press of Colorado : Mountain Studies Institute/San Juan Collaboratory, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.