MLA

Kissinger, Henry, 1923-2023. St. Box 564, folder 2. 1987-1988. https://collections.library.yale.edu/catalog/11779618.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 564, folder 2"])(1987-1988)[St]. https://collections.library.yale.edu/catalog/11779618.