MLA
Trouche, Paul E. Cotton-Field near Eatonton, Ga. [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/160cvdncnc-cor.
APA, 6th edition
Trouche, P. E. Cotton-field near Eatonton, Ga. [hand colored] (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/160cvdncnc-cor.
Chicago
Trouche, Paul E. “Cotton-Field near Eatonton, Ga. [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/160cvdncnc-cor.