MLA

Kilpatrick, Jack Frederick (1915-1967). Contract. Box 11, folder 995. 1894 December 31. https://collections.library.yale.edu/catalog/15493800.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 11, folder 995"])(1894 December 31)[Contract]. https://collections.library.yale.edu/catalog/15493800.