MLA

Kissinger, Henry, 1923-2023. Schwarz, Urs. Box 54, folder 19. 1964-1966. https://collections.library.yale.edu/catalog/11783425.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 54, folder 19"])(1964-1966)[Schwarz, Urs]. https://collections.library.yale.edu/catalog/11783425.