MLA
The Seven Days' Battles in Front of Richmond : an Outline Narrative of the Series of Engagements Which Opened at Mechanicsville, near Richmond, on Thursday, June 26, 1862, and Resulted in the Defeat and Retreat of the Northern Army under Major-General M'Clellan. Evans & Cogswell, printers|West and Johnston, 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/279v15dzh8-cor.
APA, 6th edition
The Seven Days' Battles in front of Richmond : an outline narrative of the series of engagements which opened at Mechanicsville, near Richmond, on Thursday, June 26, 1862, and resulted in the defeat and retreat of the northern army under Major-General M'Clellan. (1862). [Southern imprint]. Evans & Cogswell, printers|West and Johnston; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/279v15dzh8-cor.
Chicago
“The Seven Days' Battles in Front of Richmond : an Outline Narrative of the Series of Engagements Which Opened at Mechanicsville, near Richmond, on Thursday, June 26, 1862, and Resulted in the Defeat and Retreat of the Northern Army under Major-General M'Clellan.” Southern imprint. Civil War Imprints. Charleston, S.C.|Richmond: Evans & Cogswell, printers|West and Johnston, 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/279v15dzh8-cor.