Cite

So

MLA

Kissinger, Henry, 1923-2023. So. Box 515, folder 2. 1991. https://collections.library.yale.edu/catalog/11778828.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 515, folder 2"])(1991)[So]. https://collections.library.yale.edu/catalog/11778828.