MLA

Kissinger, Henry, 1923-2023. Chapter II [typescript]. Box 258, folder 9. 1960 September 9. https://collections.library.yale.edu/catalog/11786717.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 258, folder 9"])(1960 September 9)[Chapter II [typescript]]. https://collections.library.yale.edu/catalog/11786717.