MLA
Hugh C. Leighton Co., Manufacturers (Portland, Me.). Sunny South, home of the mountaineer : men using cows to plow the field, with women and children standing in front of a log cabin. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/221tdz08nh-cor.
APA, 6th edition
Hugh C. Leighton Co., Manufacturers (Portland, Me.). (unknown)[Sunny South, home of the mountaineer : men using cows to plow the field, with women and children standing in front of a log cabin]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/221tdz08nh-cor.
Chicago
Hugh C. Leighton Co., Manufacturers (Portland, Me.), Sunny South, home of the mountaineer : men using cows to plow the field, with women and children standing in front of a log cabin, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/221tdz08nh-cor.