MLA
Leighton & Valentine Co. (New York, N.Y.). Lake Front Avenue, Palm Beach, Fla.. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/279v15dv82-cor.
APA, 6th edition
Leighton & Valentine Co. (New York, N.Y.). (unknown)[Lake Front Avenue, Palm Beach, Fla.]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/279v15dv82-cor.
Chicago
Leighton & Valentine Co. (New York, N.Y.), Lake Front Avenue, Palm Beach, Fla., unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/279v15dv82-cor.