MLA

Kilpatrick, Jack Frederick (1915-1967). "Old Time Indian Religion Nite Hawk," with eight sets of dates and numbers. Box 7, folder 533. undated. https://collections.library.yale.edu/catalog/15492762.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 7, folder 533"])(undated)["Old Time Indian Religion Nite Hawk," with eight sets of dates and numbers]. https://collections.library.yale.edu/catalog/15492762.