MLA

Kissinger, Henry, 1923-2023. Resignation from Kissinger. Box 137, folder 10. 1959. https://collections.library.yale.edu/catalog/11784764.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 137, folder 10"])(1959)[Resignation from Kissinger]. https://collections.library.yale.edu/catalog/11784764.