MLA

Kilpatrick, Jack Frederick (1915-1967). Recto: funeral notice for Ade:lanosda Ganov:sanu:lv:hi; verso: envelope addressed to Mr. Jim Hair, Echota, Oklahoma.. Box 1, folder 56. 1939 May 13. https://collections.library.yale.edu/catalog/15492057.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 1, folder 56"])(1939 May 13)[Recto: funeral notice for Ade:lanosda Ganov:sanu:lv:hi; verso: envelope addressed to Mr. Jim Hair, Echota, Oklahoma.]. https://collections.library.yale.edu/catalog/15492057.