MLA
Crawford Bros. (Boston, Mass.). Business card, Crawford Bros.. between 1848 and 1910. William H. Scott Family Papers, 1848-1982. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5053ffbhpq-cor.
APA, 6th edition
Crawford Bros. (Boston, Mass.). (between 1848 and 1910)[Business card, Crawford Bros.]. William H. Scott Family Papers, 1848-1982, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5053ffbhpq-cor.
Chicago
Crawford Bros. (Boston, Mass.), Business card, Crawford Bros., between 1848 and 1910, William H. Scott Family Papers, 1848-1982, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5053ffbhpq-cor.