MLA

Kissinger, Henry, 1923-2023. Outlines of speeches. Box 242, folder 9. 1957 Dec, undated. https://collections.library.yale.edu/catalog/11786371.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 242, folder 9"])(1957 Dec, undated)[Outlines of speeches]. https://collections.library.yale.edu/catalog/11786371.