MLA

Kissinger, Henry, 1923-2023. Eastern Europe, general. Box 183, folder 15. 1963-1964. https://collections.library.yale.edu/catalog/11785526.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 183, folder 15"])(1963-1964)[Eastern Europe, general]. https://collections.library.yale.edu/catalog/11785526.