MLA
Zemp, and De Pass. Taking a Sun Bath, Camden, S.C. : African American Men and Women Resting by Bales of Cotton. 1907. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/293gxd2573-cor.
APA, 6th edition
Z., & De Pass. (1907). Taking a sun bath, Camden, S.C. : African American men and women resting by bales of cotton (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd2573-cor.
Chicago
Zemp, and De Pass. “Taking a Sun Bath, Camden, S.C. : African American Men and Women Resting by Bales of Cotton.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1907. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd2573-cor.