MLA

Seligmann, Kurt, 1900-1962. Childhood photographs. Box 10. 1919-1933, undated. https://collections.library.yale.edu/catalog/17197910.

APA, 6th edition

Seligmann, Kurt, 1900-1962. (["Box 10"])(1919-1933, undated)[Childhood photographs]. https://collections.library.yale.edu/catalog/17197910.