MLA

Eastman, Jervie Henry, 1880-1969. [Happy Camp Aerial View]. Box 57. https://collections.library.yale.edu/catalog/12246513.

APA, 6th edition

Eastman, Jervie Henry, 1880-1969. (["Box 57"])[[Happy Camp Aerial View]]. https://collections.library.yale.edu/catalog/12246513.