O
MLA
Kissinger, Henry, 1923-2023. O. Box 21, folder 9. 2003-2004. https://collections.library.yale.edu/catalog/12481214.
APA, 6th edition
Kissinger, Henry, 1923-2023. (["Box 21, folder 9"])(2003-2004)[O]. https://collections.library.yale.edu/catalog/12481214.