MLA
Souvenir Post Card Co. (New York, N.Y.). Whoa Maud : an African American man and woman riding in a mule-drawn cart. October 2, 1907. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/334fn2z376-cor.
APA, 6th edition
Souvenir Post Card Co. (New York, N.Y.). (October 2, 1907)[Whoa Maud : an African American man and woman riding in a mule-drawn cart]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/334fn2z376-cor.
Chicago
Souvenir Post Card Co. (New York, N.Y.), Whoa Maud : an African American man and woman riding in a mule-drawn cart, October 2, 1907, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/334fn2z376-cor.