MLA

Kissinger, Henry, 1923-2023. Read, Benjamin. Box 50, folder 16. 1967. https://collections.library.yale.edu/catalog/11783331.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 50, folder 16"])(1967)[Read, Benjamin]. https://collections.library.yale.edu/catalog/11783331.