APA (7th ed.) Citation

Clarke, M. D. (1861). Beauregard at Manassas. [publisher not identified].

Chicago Style (17th ed.) Citation

Clarke, Mary Devereux. Beauregard at Manassas. [Place of publication not identified]: [publisher not identified], 1861.

MLA (9th ed.) Citation

Clarke, Mary Devereux. Beauregard at Manassas. [publisher not identified], 1861.