MLA

Kissinger, Henry, 1923-2023. Birrenbach, Kurt. Box 8, folder 24. 1963-1965. https://collections.library.yale.edu/catalog/11782422.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 8, folder 24"])(1963-1965)[Birrenbach, Kurt]. https://collections.library.yale.edu/catalog/11782422.