MLA

Kissinger, Henry, 1923-2023. Hi. Box 26, folder 19. 1952-1968. https://collections.library.yale.edu/catalog/11782801.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 26, folder 19"])(1952-1968)[Hi]. https://collections.library.yale.edu/catalog/11782801.