MLA

Kilpatrick, Jack Frederick (1915-1967). Financial record. Box 11, folder 1003. undated. https://collections.library.yale.edu/catalog/15493808.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 11, folder 1003"])(undated)[Financial record]. https://collections.library.yale.edu/catalog/15493808.