MLA

Kissinger, Henry, 1923-2023. Katz, Milton. Box 34, folder 10. 1963-1968. https://collections.library.yale.edu/catalog/11782972.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 34, folder 10"])(1963-1968)[Katz, Milton]. https://collections.library.yale.edu/catalog/11782972.