To
MLA
Kissinger, Henry, 1923-2023. To. Box 536, folder 16. 1997. https://collections.library.yale.edu/catalog/11779195.
APA, 6th edition
Kissinger, Henry, 1923-2023. (["Box 536, folder 16"])(1997)[To]. https://collections.library.yale.edu/catalog/11779195.