APA (7th ed.) Citation

McChristian, D. C., & Utley, R. M. (2017). Regular Army O!: Soldiering on the Western frontier, 1865-1891. University of Oklahoma Press.

Chicago Style (17th ed.) Citation

McChristian, Douglas C., and Robert M. Utley. Regular Army O!: Soldiering on the Western Frontier, 1865-1891. Norman: University of Oklahoma Press, 2017.

MLA (9th ed.) Citation

McChristian, Douglas C., and Robert M. Utley. Regular Army O!: Soldiering on the Western Frontier, 1865-1891. University of Oklahoma Press, 2017.