MLA
Co., Paul C. Koeber. Pittsburgh, Pa., Stephen Foster Memorial, Highland Park [Hand Colored]. 1908. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/13331zcrm0-cor.
APA, 6th edition
Co., P. C. K. (1908). Pittsburgh, Pa., Stephen Foster Memorial, Highland Park [hand colored] (Box 71) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/13331zcrm0-cor.
Chicago
Co., Paul C. Koeber. “Pittsburgh, Pa., Stephen Foster Memorial, Highland Park [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, 1908. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/13331zcrm0-cor.