MLA
Souvenir Post Card Co. (N.Y.). A little dew-drop : an African American child sitting on a blanket. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/532d7wm39t-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (unknown)[A little dew-drop : an African American child sitting on a blanket]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/532d7wm39t-cor.
Chicago
Souvenir Post Card Co. (N.Y.), A little dew-drop : an African American child sitting on a blanket, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/532d7wm39t-cor.