MLA

Kissinger, Henry, 1923-2023. Br. Box 609, folder 7. 1998. https://collections.library.yale.edu/catalog/11780199.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 609, folder 7"])(1998)[Br]. https://collections.library.yale.edu/catalog/11780199.