MLA

Kissinger, Henry, 1923-2023. Correspondence. Box 94, folder 9. 1957 November-1958 March. https://collections.library.yale.edu/catalog/11784032.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 94, folder 9"])(1957 November-1958 March)[Correspondence]. https://collections.library.yale.edu/catalog/11784032.