Cite

Miss Alexander (?), Grace M. Boynton and President John L. Stuart at the Summer Palace picnic

MLA

Miss Alexander (?), Grace M. Boynton and President John L. Stuart at the Summer Palace Picnic. 0AD. https://collections.library.yale.edu/catalog/17230834.

APA, 6th edition

Miss Alexander (?), Grace M. Boynton and President John L. Stuart at the Summer Palace picnic. (0 C.E.). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/17230834.