APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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