MLA
St. Petersburg Post Card Association (St. Petersburg, Fla.). Seven up : an African American woman and 7 children, descending in height, standing in front of a log cabin, with a dog [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3v07-cor.
APA, 6th edition
St. Petersburg Post Card Association (St. Petersburg, Fla.). (unknown)[Seven up : an African American woman and 7 children, descending in height, standing in front of a log cabin, with a dog [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3v07-cor.
Chicago
St. Petersburg Post Card Association (St. Petersburg, Fla.), Seven up : an African American woman and 7 children, descending in height, standing in front of a log cabin, with a dog [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3v07-cor.