[Photograph of three men on a snow field]
MLA
[Photograph of Three Men on a Snow Field]. 0AD. https://collections.library.yale.edu/catalog/2014815.
APA, 6th edition
[Photograph of three men on a snow field]. (0 C.E.). [Photograph albums, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2014815.