MLA

Kissinger, Henry, 1923-2023. Ch. Box 526, folder 6. 1994-1995. https://collections.library.yale.edu/catalog/11779020.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 526, folder 6"])(1994-1995)[Ch]. https://collections.library.yale.edu/catalog/11779020.