MLA
Photochrom., C. T. Have a Drink, Sir : an African American Girl Pulling a Bucket of Water from a Well : Five Children and a Woman in the Background. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/4988gtht90-cor.
APA, 6th edition
Photochrom., C. T. Have a drink, Sir : an African American girl pulling a bucket of water from a well : five children and a woman in the background (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4988gtht90-cor.
Chicago
Photochrom., C. T. “Have a Drink, Sir : an African American Girl Pulling a Bucket of Water from a Well : Five Children and a Woman in the Background.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4988gtht90-cor.