MLA
Artvue Post Card Co. (New York, N.Y.). St. Gabriel's Colored Mission, Greenville, North Carolina. May 29, 1955. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1741rn8pn2-cor.
APA, 6th edition
Artvue Post Card Co. (New York, N.Y.). (May 29, 1955)[St. Gabriel's Colored Mission, Greenville, North Carolina]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1741rn8pn2-cor.
Chicago
Artvue Post Card Co. (New York, N.Y.), St. Gabriel's Colored Mission, Greenville, North Carolina, May 29, 1955, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1741rn8pn2-cor.