MLA
Huld, Franz. The Prophet Second Peter : (a Florida Type) : an African American Man Sitting on a Cow [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/337vmcvdqp-cor.
APA, 6th edition
Huld, F. The prophet second Peter : (a Florida type) : an African American man sitting on a cow [hand colored] (Box 72) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/337vmcvdqp-cor.
Chicago
Huld, Franz. “The Prophet Second Peter : (a Florida Type) : an African American Man Sitting on a Cow [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/337vmcvdqp-cor.