APA (7th ed.) Citation

Parkman, F., Feltskog, E. N., & Remington, F. (1969). The Oregon Trail. University of Wisconsin Press.

Chicago Style (17th ed.) Citation

Parkman, Francis, E. N. Feltskog, and Frederic Remington. The Oregon Trail. Madison: University of Wisconsin Press, 1969.

MLA (9th ed.) Citation

Parkman, Francis, et al. The Oregon Trail. University of Wisconsin Press, 1969.