MLA
Souvenir of Houston, Texas : Weighing Cotton. 1906. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/194hmgqnp8-cor.
APA, 6th edition
Souvenir of Houston, Texas : weighing cotton (Box 68). (1906). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/194hmgqnp8-cor.
Chicago
“Souvenir of Houston, Texas : Weighing Cotton.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1906. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/194hmgqnp8-cor.