Cite

[No. 105: Photograph of valley with mountains in background]

MLA

[No. 105: Photograph of Valley with Mountains in Background]. 1915. https://collections.library.yale.edu/catalog/11680786.

APA, 6th edition

[No. 105: Photograph of valley with mountains in background]. (1915). [Photographs]. https://collections.library.yale.edu/catalog/11680786.