MLA

Kissinger, Henry, 1923-2023. Jones, Alun Gwynne. Box 32, folder 19. 1966-1967. https://collections.library.yale.edu/catalog/11782942.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 32, folder 19"])(1966-1967)[Jones, Alun Gwynne]. https://collections.library.yale.edu/catalog/11782942.