MLA

Kissinger, Henry, 1923-2023. Press. Box 119, folder 10. 1957 July. https://collections.library.yale.edu/catalog/11784425.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 119, folder 10"])(1957 July)[Press]. https://collections.library.yale.edu/catalog/11784425.