APA (7th ed.) Citation

Huggins, E. L., & Haines, F. Letters of an army captain on the Sioux campaign of 1879-1880.

Chicago Style (17th ed.) Citation

Huggins, E. L., and Francis Haines. Letters of an Army Captain on the Sioux Campaign of 1879-1880. n.p.

MLA (8th ed.) Citation

Huggins, E. L., and Francis Haines. Letters of an Army Captain on the Sioux Campaign of 1879-1880.

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