APA (7th ed.) Citation

Shope, I. (1948). Old Oregon Trail. American Pioneer Trails Association.

Chicago Style (17th ed.) Citation

Shope, Irvin. Old Oregon Trail. [S.l.]: American Pioneer Trails Association, 1948.

MLA (8th ed.) Citation

Shope, Irvin. Old Oregon Trail. American Pioneer Trails Association, 1948.

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