APA (7th ed.) Citation

Parkman, F., & Levin, D. (1982). The Oregon Trail. Penguin Books.

Chicago Style (17th ed.) Citation

Parkman, Francis, and David Levin. The Oregon Trail. Harmondsworth, Middlesex, England ; New York, N.Y.: Penguin Books, 1982.

MLA (8th ed.) Citation

Parkman, Francis, and David Levin. The Oregon Trail. Penguin Books, 1982.

Warning: These citations may not always be 100% accurate.