APA (7th ed.) Citation

Bier, J. A. (1993). 1830-1870 western emigrant trails, major trails, cutoffs, and alternates. Oregon-California Trails Assoc..

Chicago Style (17th ed.) Citation

Bier, James Allen. 1830-1870 Western Emigrant Trails, Major Trails, Cutoffs, and Alternates. Independence, Mo.: Oregon-California Trails Assoc., 1993.

MLA (8th ed.) Citation

Bier, James Allen. 1830-1870 Western Emigrant Trails, Major Trails, Cutoffs, and Alternates. Oregon-California Trails Assoc., 1993.

Warning: These citations may not always be 100% accurate.