MLA
Park, Robert Emory, -1909. Sketch of the Twelfth Alabama Infantry of Battle's Brigade, Rodes' Division, Early's Corps, of the Army of Northern Virginia. 1906. Regimental Histories. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttf2ng-cor.
APA, 6th edition
Park, Robert Emory, -1909. (1906)[Sketch of the Twelfth Alabama Infantry of Battle's Brigade, Rodes' Division, Early's Corps, of the Army of Northern Virginia]. Regimental Histories, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttf2ng-cor.
Chicago
Park, Robert Emory, -1909, Sketch of the Twelfth Alabama Infantry of Battle's Brigade, Rodes' Division, Early's Corps, of the Army of Northern Virginia, 1906, Regimental Histories, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttf2ng-cor.