MLA
Bulls Pulling a Cart with Cotton Seed for H. Schumacher Oil Works. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1. https://digital.library.emory.edu/purl/375dbrv19t-cor.
APA, 6th edition
Bulls pulling a cart with cotton seed for H. Schumacher Oil Works (Box 1). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/375dbrv19t-cor.
Chicago
“Bulls Pulling a Cart with Cotton Seed for H. Schumacher Oil Works.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/375dbrv19t-cor.