MLA

Kissinger, Henry, 1923-2023. Correspondence. Box 120, folder 10. 1961-1962 May. https://collections.library.yale.edu/catalog/11784445.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 120, folder 10"])(1961-1962 May)[Correspondence]. https://collections.library.yale.edu/catalog/11784445.