MLA
Souvenir Post Card Co. (N.Y.). De 'Possum Hunt Caught : an older African American man and a boy hunting a opossum. March 30, 1911. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/740ksn02zx-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (March 30, 1911)[De 'Possum Hunt Caught : an older African American man and a boy hunting a opossum]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/740ksn02zx-cor.
Chicago
Souvenir Post Card Co. (N.Y.), De 'Possum Hunt Caught : an older African American man and a boy hunting a opossum, March 30, 1911, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/740ksn02zx-cor.