MLA

Kissinger, Henry, 1923-2023. Columbia University. Box 13, folder 16. 1965-1969. https://collections.library.yale.edu/catalog/11782524.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 13, folder 16"])(1965-1969)[Columbia University]. https://collections.library.yale.edu/catalog/11782524.