MLA
M. P. S., Miss. Mara, or, A Romance of the War : a Poem. Mississipian Steam Book and Job Office, 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/262s4mw9w6-cor.
APA, 6th edition
M. P. S., M. (1864). Mara, or, A romance of the war : a poem [Southern imprint]. Mississipian Steam Book and Job Office; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/262s4mw9w6-cor.
Chicago
M. P. S., Miss. “Mara, or, A Romance of the War : a Poem.” Southern imprint. Civil War Imprints. Selma, Ala.: Mississipian Steam Book and Job Office, 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/262s4mw9w6-cor.