MLA
Union Patriotic Envelope - "Columbia, Columbia, to Glory Arise, The Queen of the World and the Child of the Skies; Thy Genius Commands Thee; with Rapture Behold, While Ages on Ages Thy Spendours Unfold.". 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 21, Folder 7. https://digital.library.emory.edu/purl/542n5tb3xn-cor.
APA, 6th edition
Union patriotic envelope - "Columbia, Columbia, to glory arise, The queen of the world and the child of the skies; thy genius commands thee; with rapture behold, While ages on ages thy spendours unfold." (Box 21, Folder 7). (1861). [Envelopes]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/542n5tb3xn-cor.
Chicago
“Union Patriotic Envelope - ‘Columbia, Columbia, to Glory Arise, The Queen of the World and the Child of the Skies; Thy Genius Commands Thee; with Rapture Behold, While Ages on Ages Thy Spendours Unfold.".” Envelopes. Civil War Collection, 1861. Box 21, Folder 7. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/542n5tb3xn-cor.