MLA
[Circular Letter on Organization of Troops, Election, Appointment and Rank of Officers : Terms of Acceptance, Arms and Equipments ; Muster into Service, Pay, Bounty, &c. ; Supplies and Allowances ; Furloughs, Discharges, Resignations, &c. [publisher not identified], 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gthtb6z-cor.
APA, 6th edition
[Circular letter on organization of troops, election, appointment and rank of officers : terms of acceptance, arms and equipments ; muster into service, pay, bounty, &c. ; supplies and allowances ; furloughs, discharges, resignations, &c. (1862). [publisher not identified]; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gthtb6z-cor.
Chicago
“[Circular Letter on Organization of Troops, Election, Appointment and Rank of Officers : Terms of Acceptance, Arms and Equipments ; Muster into Service, Pay, Bounty, &c. ; Supplies and Allowances ; Furloughs, Discharges, Resignations, &c.” Civil War Imprints. [Richmond]: [publisher not identified], 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gthtb6z-cor.