MLA

Kissinger, Henry, 1923-2023. Schm-Schw. Box 545, folder 5. 1999. https://collections.library.yale.edu/catalog/11779329.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 545, folder 5"])(1999)[Schm-Schw]. https://collections.library.yale.edu/catalog/11779329.