MLA

Kissinger, Henry, 1923-2023. Na. Box 491, folder 6. 1986-1987. https://collections.library.yale.edu/catalog/11778481.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 491, folder 6"])(1986-1987)[Na]. https://collections.library.yale.edu/catalog/11778481.