[Photograph of sheer mountain ridge, lake in foreground]
MLA
[Photograph of Sheer Mountain Ridge, Lake in Foreground]. 1915. https://collections.library.yale.edu/catalog/11683483.
APA, 6th edition
[Photograph of sheer mountain ridge, lake in foreground]. (1915). [Photographs, Slides (glass)]. https://collections.library.yale.edu/catalog/11683483.