MLA

Kissinger, Henry, 1923-2023. Fo. Box 582, folder 1. 1990-1991. https://collections.library.yale.edu/catalog/11779831.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 582, folder 1"])(1990-1991)[Fo]. https://collections.library.yale.edu/catalog/11779831.