MLA
Lagerberg, Ted. Field of Caladiums near Lake Placid, Florida : Two Women, One Wearing a Dress and Glasses and One Pants and a Blouse, Standing in a Field of Caladiums, Each Holding a Caladium with Three Men in the Background [Hand Colored]. 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/5805x69pck-cor.
APA, 6th edition
Lagerberg, T. (1910). Field of Caladiums near Lake Placid, Florida : two women, one wearing a dress and glasses and one pants and a blouse, standing in a field of caladiums, each holding a caladium with three men in the background [hand colored] (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5805x69pck-cor.
Chicago
Lagerberg, Ted. “Field of Caladiums near Lake Placid, Florida : Two Women, One Wearing a Dress and Glasses and One Pants and a Blouse, Standing in a Field of Caladiums, Each Holding a Caladium with Three Men in the Background [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, 1910. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5805x69pck-cor.