MLA

Kissinger, Henry, 1923-2023. Rooms and books. Box 129, folder 10. 1967 August-1968 Sep, undated. https://collections.library.yale.edu/catalog/11784607.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 129, folder 10"])(1967 August-1968 Sep, undated)[Rooms and books]. https://collections.library.yale.edu/catalog/11784607.