MLA
Fowler (Philadelphia, Pa.). Philadelphia police officer in uniform. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/11615dv42c-cor.
APA, 6th edition
Fowler (Philadelphia, Pa.). (unknown)[Philadelphia police officer in uniform]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/11615dv42c-cor.
Chicago
Fowler (Philadelphia, Pa.), Philadelphia police officer in uniform, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/11615dv42c-cor.