MLA

Kissinger, Henry, 1923-2023. Bailey, Douglas. Box 149, folder 7. 1964 January-September. https://collections.library.yale.edu/catalog/11784970.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 149, folder 7"])(1964 January-September)[Bailey, Douglas]. https://collections.library.yale.edu/catalog/11784970.