MLA
Eagle Post Card View Co. (New York, N.Y.). The Princess Hotel and cottage colony, Hamilton, Bermuda. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6149p8cz9g-cor.
APA, 6th edition
Eagle Post Card View Co. (New York, N.Y.). (unknown)[The Princess Hotel and cottage colony, Hamilton, Bermuda]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6149p8cz9g-cor.
Chicago
Eagle Post Card View Co. (New York, N.Y.), The Princess Hotel and cottage colony, Hamilton, Bermuda, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6149p8cz9g-cor.