Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.