MLA

Kilpatrick, Jack Frederick (1915-1967). Obituary. Box 9, folder 734. 1915 May 4. https://collections.library.yale.edu/catalog/15493132.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 9, folder 734"])(1915 May 4)[Obituary]. https://collections.library.yale.edu/catalog/15493132.