MLA
Collier, Robert R. (Robert Ruffin), 1805-1870. Correspondence and remarks on two occasions in the Senate of Virginia, on the subject of martial law and arrests and confinement of civilians by military orders.. 1863. Civil War Imprints. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/194hmgqrw8-cor.
APA, 6th edition
Collier, Robert R. (Robert Ruffin), 1805-1870. (1863)[Correspondence and remarks on two occasions in the Senate of Virginia, on the subject of martial law and arrests and confinement of civilians by military orders.]. Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/194hmgqrw8-cor.
Chicago
Collier, Robert R. (Robert Ruffin), 1805-1870, Correspondence and remarks on two occasions in the Senate of Virginia, on the subject of martial law and arrests and confinement of civilians by military orders., 1863, Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/194hmgqrw8-cor.