MLA

Kissinger, Henry, 1923-2023. Kleiman, Robert. Box 35, folder 19. 1963-1967. https://collections.library.yale.edu/catalog/11783006.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 35, folder 19"])(1963-1967)[Kleiman, Robert]. https://collections.library.yale.edu/catalog/11783006.