MLA

Kissinger, Henry, 1923-2023. Harper and Brothers. Box 27, folder 22. 1960 July-December. https://collections.library.yale.edu/catalog/11782825.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 27, folder 22"])(1960 July-December)[Harper and Brothers]. https://collections.library.yale.edu/catalog/11782825.