MLA

Kissinger, Henry, 1923-2023. Chapter II [part manuscript]. Box 266, folder 12. Circa 1964. https://collections.library.yale.edu/catalog/11786816.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 266, folder 12"])(Circa 1964)[Chapter II [part manuscript]]. https://collections.library.yale.edu/catalog/11786816.