MLA
Missouri Greeting Card Co. (St. Louis, Mo.). St. Louis Colored Orphans Home in St. Louis, Mo.. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn32n-cor.
APA, 6th edition
Missouri Greeting Card Co. (St. Louis, Mo.). (unknown)[St. Louis Colored Orphans Home in St. Louis, Mo.]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn32n-cor.
Chicago
Missouri Greeting Card Co. (St. Louis, Mo.), St. Louis Colored Orphans Home in St. Louis, Mo., unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn32n-cor.