MLA
Artvue Post Card Co. (New York, N.Y.). St. Gabriel's Mission for Colored, Greenville, North Carolina. December 17, 1954. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/798mcvdnfz-cor.
APA, 6th edition
Artvue Post Card Co. (New York, N.Y.). (December 17, 1954)[St. Gabriel's Mission for Colored, Greenville, North Carolina]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/798mcvdnfz-cor.
Chicago
Artvue Post Card Co. (New York, N.Y.), St. Gabriel's Mission for Colored, Greenville, North Carolina, December 17, 1954, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/798mcvdnfz-cor.