MLA

Kissinger, Henry, 1923-2023. Bauer, Etienne. Box 8, folder 8. 1966-1967. https://collections.library.yale.edu/catalog/11782406.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 8, folder 8"])(1966-1967)[Bauer, Etienne]. https://collections.library.yale.edu/catalog/11782406.