MLA
Co., Sanderson Drug. Unloading Wool, Sanderson, Texas. 1911. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/044bnzs7n3-cor.
APA, 6th edition
Co., S. D. (1911). Unloading wool, Sanderson, Texas (Box 71) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/044bnzs7n3-cor.
Chicago
Co., Sanderson Drug. “Unloading Wool, Sanderson, Texas.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1911. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/044bnzs7n3-cor.