MLA

Kissinger, Henry, 1923-2023. Atlantic Congress, London, Jun 2-10, 1959. Box 244, folder 12. 1959 February-June. https://collections.library.yale.edu/catalog/11786415.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 244, folder 12"])(1959 February-June)[Atlantic Congress, London, Jun 2-10, 1959]. https://collections.library.yale.edu/catalog/11786415.