MLA

Kilpatrick, Jack Frederick (1915-1967). Sunday School notice. Box 1, folder 59. 1929 December 12. https://collections.library.yale.edu/catalog/15492060.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 1, folder 59"])(1929 December 12)[Sunday School notice]. https://collections.library.yale.edu/catalog/15492060.