APA (7th ed.) Citation

Downing, A. G., & Clark, O. B. (1916). Downing's civil war diary. The Historical Dept. of Iowa.

Chicago Style (17th ed.) Citation

Downing, Alexander G., and Olynthus Burroughs Clark. Downing's Civil War Diary. Des Moines: The Historical Dept. of Iowa, 1916.

MLA (9th ed.) Citation

Downing, Alexander G., and Olynthus Burroughs Clark. Downing's Civil War Diary. The Historical Dept. of Iowa, 1916.