MLA

Kissinger, Henry, 1923-2023. Carousel Ball. Box 703, folder 21. 1986. https://collections.library.yale.edu/catalog/11781463.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 703, folder 21"])(1986)[Carousel Ball]. https://collections.library.yale.edu/catalog/11781463.