MLA
Artvue Post Card Co. (New York, N.Y.). Man playing guitar for a group of kids in front of a log cabin : and children sitting around a campfire, in front of a row of tents, at Camp Asbury. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7375tb2rgp-cor.
APA, 6th edition
Artvue Post Card Co. (New York, N.Y.). (unknown)[Man playing guitar for a group of kids in front of a log cabin : and children sitting around a campfire, in front of a row of tents, at Camp Asbury]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7375tb2rgp-cor.
Chicago
Artvue Post Card Co. (New York, N.Y.), Man playing guitar for a group of kids in front of a log cabin : and children sitting around a campfire, in front of a row of tents, at Camp Asbury, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7375tb2rgp-cor.