American Pioneer Trails Association. Oregon Council & Dowling, C. M. (1945). Oregon's historic trails and "story spots".
Cita Chicago Style (17a ed.)American Pioneer Trails Association. Oregon Council y Colista M. Dowling. Oregon's Historic Trails and "Story Spots". Portland, Or, 1945.
Cita MLA (8a ed.)American Pioneer Trails Association. Oregon Council y Colista M. Dowling. Oregon's Historic Trails and "Story Spots". 1945.
Precaución: Estas citas no son 100% exactas.