Cite

Autograph letter, annotated "Barber, Okla."

MLA

Kilpatrick, Jack Frederick (1915-1967). Autograph letter, annotated "Barber, Okla.". Box 1, folder 76. 1933 November 18. https://collections.library.yale.edu/catalog/15492077.

APA, 6th edition

Kilpatrick, Jack Frederick (1915-1967). (["Box 1, folder 76"])(1933 November 18)[Autograph letter, annotated "Barber, Okla."]. https://collections.library.yale.edu/catalog/15492077.