MLA
Custombook, Inc. Active Church Organizations : a Group of African Americans Standing in Front of a Church, Three African Americans in a Classroom, a Priest Holding a Small Child with Two Others Watching, and a Woman Sitting at a Piano with a Choir around Her. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/344pk0p2qf-cor.
APA, 6th edition
Custombook, I. Active church organizations : a group of African Americans standing in front of a church, three African Americans in a classroom, a priest holding a small child with two others watching, and a woman sitting at a piano with a choir around her (Box 74) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p2qf-cor.
Chicago
Custombook, Inc. “Active Church Organizations : a Group of African Americans Standing in Front of a Church, Three African Americans in a Classroom, a Priest Holding a Small Child with Two Others Watching, and a Woman Sitting at a Piano with a Choir around Her.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p2qf-cor.