MLA

Kilpatrick, Jack Frederick (1915-1967). Recto: Note, on election ballot; Verso: Note on English grammar. Box 12, folder 1095. after 1940 August 5. https://collections.library.yale.edu/catalog/15494004.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 12, folder 1095"])(after 1940 August 5)[Recto: Note, on election ballot; Verso: Note on English grammar]. https://collections.library.yale.edu/catalog/15494004.