MLA

Kilpatrick, Jack Frederick (1915-1967). Financial record. Box 7, folder 600. undated. https://collections.library.yale.edu/catalog/15492894.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 7, folder 600"])(undated)[Financial record]. https://collections.library.yale.edu/catalog/15492894.