MLA

Kissinger, Henry, 1923-2023. Final exam. Box 129, folder 5. 1969 January. https://collections.library.yale.edu/catalog/11784602.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 129, folder 5"])(1969 January)[Final exam]. https://collections.library.yale.edu/catalog/11784602.