Cite

Autograph letter, annotated "Barber, Okla."

MLA

Kilpatrick, Jack Frederick. Autograph Letter, Annotated "Barber, Okla.". 1933. https://collections.library.yale.edu/catalog/15492077.

APA, 6th edition

Kilpatrick, J. F. (1933). Autograph letter, annotated "Barber, Okla.". https://collections.library.yale.edu/catalog/15492077.