MLA

Kissinger, Henry, 1923-2023. Bro. Box 6, folder 16. 1958-1969. https://collections.library.yale.edu/catalog/11782378.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 6, folder 16"])(1958-1969)[Bro]. https://collections.library.yale.edu/catalog/11782378.