MLA

Kissinger, Henry, 1923-2023. Ma. Box 14, folder 9. 2003. https://collections.library.yale.edu/catalog/12480450.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 14, folder 9"])(2003)[Ma]. https://collections.library.yale.edu/catalog/12480450.