MLA

Kissinger, Henry, 1923-2023. Dr. Box 483, folder 9. 1986. https://collections.library.yale.edu/catalog/11778362.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 483, folder 9"])(1986)[Dr]. https://collections.library.yale.edu/catalog/11778362.