MLA

Kissinger, Henry, 1923-2023. Bailey, Douglas. Box 7, folder 10. 1966-1967. https://collections.library.yale.edu/catalog/11782388.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 7, folder 10"])(1966-1967)[Bailey, Douglas]. https://collections.library.yale.edu/catalog/11782388.