MLA

Kissinger, Henry, 1923-2023. Korean Prime Minister. Box 36, folder 6. 1967. https://collections.library.yale.edu/catalog/11783019.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 36, folder 6"])(1967)[Korean Prime Minister]. https://collections.library.yale.edu/catalog/11783019.