Illustrations, photostats
MLA
Seligmann, Kurt, 1900-1962. Illustrations, photostats. Box 6. undated. https://collections.library.yale.edu/catalog/2018648.
APA, 6th edition
Seligmann, Kurt, 1900-1962. (["Box 6"])(undated)[Illustrations, photostats]. https://collections.library.yale.edu/catalog/2018648.