APA (7th ed.) Citation

Parkman, F. (1949). The Oregon trail: Sketches of prairie and Rocky-mountain life (1st Modern Library ed.). Modern Library.

Chicago Style (17th ed.) Citation

Parkman, Francis. The Oregon Trail: Sketches of Prairie and Rocky-mountain Life. 1st Modern Library ed. New York: Modern Library, 1949.

MLA (9th ed.) Citation

Parkman, Francis. The Oregon Trail: Sketches of Prairie and Rocky-mountain Life. 1st Modern Library ed. Modern Library, 1949.