Parkman, F. (1949). The oregon trail. Random House.
Lua i Stíl Chicago (17ú heag.)Parkman, Francis. The Oregon Trail. New York: Random House, 1949.
Lua MLA (9ú heag.)Parkman, Francis. The Oregon Trail. Random House, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.