Parkman, F., & Levin, D. (1982). The Oregon Trail. Penguin Books.
Chicago Style (17th ed.) CitationParkman, Francis, and David Levin. The Oregon Trail. Harmondsworth, Middlesex, England ; New York, N.Y.: Penguin Books, 1982.
MLA (8th ed.) CitationParkman, Francis, and David Levin. The Oregon Trail. Penguin Books, 1982.
Warning: These citations may not always be 100% accurate.