MLA

Kissinger, Henry, 1923-2023. Bailey, Douglas. Box 7, folder 9. 1965 July-October. https://collections.library.yale.edu/catalog/11782387.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 7, folder 9"])(1965 July-October)[Bailey, Douglas]. https://collections.library.yale.edu/catalog/11782387.