MLA

Kilpatrick, Jack Frederick (1915-1967). "Dunlap's colic remedy for horses and mules" and unidentified Cherokee text. Box 7, folder 581. undated. https://collections.library.yale.edu/catalog/15492881.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 7, folder 581"])(undated)["Dunlap's colic remedy for horses and mules" and unidentified Cherokee text]. https://collections.library.yale.edu/catalog/15492881.