Parkman, F. The Oregon trail: Sketches of Prairie and Rocky-Mountain Life.
Cita Chicago (17th ed.)Parkman, Francis. The Oregon Trail: Sketches of Prairie and Rocky-Mountain Life.
Cita MLA (8th ed.)Parkman, Francis. The Oregon Trail: Sketches of Prairie and Rocky-Mountain Life.
Atenció: Aquestes cites poden no estar 100% correctes.