MLA
Taylor, M. L. Business Card, M. L. Taylor. 1848. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 6. https://digital.library.emory.edu/purl/013mw6mbhd-cor.
APA, 6th edition
Taylor, M. L. (1848). Business card, M. L. Taylor (Box 1, Folder 6) [Business cards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/013mw6mbhd-cor.
Chicago
Taylor, M. L. “Business Card, M. L. Taylor.” Business cards. William H. Scott Family Papers, 1848-1982, 1848. Box 1, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/013mw6mbhd-cor.