MLA

Hulme, Kathryn, 1900-1981. Aschaffenburg camp. Box 44, folder 657. 1947. https://collections.library.yale.edu/catalog/9999021.

APA, 6th edition

Hulme, Kathryn, 1900-1981. (["Box 44, folder 657"])(1947)[Aschaffenburg camp]. https://collections.library.yale.edu/catalog/9999021.