MLA

Kissinger, Henry, 1923-2023. von Schlabrendorff, Fabian. Box 61, folder 17. 1962-1968. https://collections.library.yale.edu/catalog/11783572.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 61, folder 17"])(1962-1968)[von Schlabrendorff, Fabian]. https://collections.library.yale.edu/catalog/11783572.