MLA

Kissinger, Henry, 1923-2023. Unidentified. Box 65, folder 10. 1948-1968, undated. https://collections.library.yale.edu/catalog/11783669.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 65, folder 10"])(1948-1968, undated)[Unidentified]. https://collections.library.yale.edu/catalog/11783669.