Cite

So

MLA

Kissinger, Henry, 1923-2023. So. Box 502, folder 1. 1987-1988. https://collections.library.yale.edu/catalog/11778624.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 502, folder 1"])(1987-1988)[So]. https://collections.library.yale.edu/catalog/11778624.