S
MLA
Kissinger, Henry, 1923-2023. S. Box 340, folder 3. 1968 December-1969 January. https://collections.library.yale.edu/catalog/11775073.
APA, 6th edition
Kissinger, Henry, 1923-2023. (["Box 340, folder 3"])(1968 December-1969 January)[S]. https://collections.library.yale.edu/catalog/11775073.