MLA

Kilpatrick, Jack Frederick (1915-1967). Obituary. Box 10, folder 846. 1898 September 26. https://collections.library.yale.edu/catalog/15493149.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 10, folder 846"])(1898 September 26)[Obituary]. https://collections.library.yale.edu/catalog/15493149.