Cite

[Photograph of the class enjoying a snack while Sally Palmquist and another adult observe]

MLA

[Photograph of the Class Enjoying a Snack While Sally Palmquist and Another Adult Observe]. 1964. https://collections.library.yale.edu/catalog/2068394.

APA, 6th edition

[Photograph of the class enjoying a snack while Sally Palmquist and another adult observe]. (1964). [Negatives]. https://collections.library.yale.edu/catalog/2068394.