MLA

Kissinger, Henry, 1923-2023. European discussion group. Box 93, folder 9. 1965-1966. https://collections.library.yale.edu/catalog/11784018.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 93, folder 9"])(1965-1966)[European discussion group]. https://collections.library.yale.edu/catalog/11784018.