APA (7th ed.) Citation

Parkman, F., Van Doren, M., & Daugherty, J. H. (1931). The Oregon trail. Farrar & Rinehart incorporated.

Chicago Style (17th ed.) Citation

Parkman, Francis, Mark Van Doren, and James Henry Daugherty. The Oregon Trail. New York: Farrar & Rinehart incorporated, 1931.

MLA (8th ed.) Citation

Parkman, Francis, et al. The Oregon Trail. Farrar & Rinehart incorporated, 1931.