MLA

Kissinger, Henry, 1923-2023. Fo. Box 489, folder 4. 1986-1987. https://collections.library.yale.edu/catalog/11778450.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 489, folder 4"])(1986-1987)[Fo]. https://collections.library.yale.edu/catalog/11778450.