American Pioneer Trails Association. Oregon Council & Dowling, C. M. (1945). Oregon's historic trails and "story spots".
Style de citation Chicago (17e éd.)American Pioneer Trails Association. Oregon Council et Colista M. Dowling. Oregon's Historic Trails and "Story Spots". Portland, Or, 1945.
Style de citation MLA (8e éd.)American Pioneer Trails Association. Oregon Council et Colista M. Dowling. Oregon's Historic Trails and "Story Spots". 1945.
Attention : ces citations peuvent ne pas être correctes à 100%.