Bier, J. A. (1993). 1830-1870 western emigrant trails, major trails, cutoffs, and alternates. Oregon-California Trails Assoc..
Style de citation Chicago (17e éd.)Bier, James Allen. 1830-1870 Western Emigrant Trails, Major Trails, Cutoffs, and Alternates. Independence, Mo.: Oregon-California Trails Assoc., 1993.
Style de citation MLA (8e éd.)Bier, James Allen. 1830-1870 Western Emigrant Trails, Major Trails, Cutoffs, and Alternates. Oregon-California Trails Assoc., 1993.
Attention : ces citations peuvent ne pas être correctes à 100%.