MLA

Kissinger, Henry, 1923-2023. He. Box 475, folder 6. 1984-1985. https://collections.library.yale.edu/catalog/11778260.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 475, folder 6"])(1984-1985)[He]. https://collections.library.yale.edu/catalog/11778260.