MLA

Kilpatrick, Jack Frederick (1915-1967). Birth record. Box 7, folder 538. undated. https://collections.library.yale.edu/catalog/15492767.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 7, folder 538"])(undated)[Birth record]. https://collections.library.yale.edu/catalog/15492767.