MLA

Kissinger, Henry, 1923-2023. Bo. Box 326, folder 6. 1973-1977. https://collections.library.yale.edu/catalog/11774879.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 326, folder 6"])(1973-1977)[Bo]. https://collections.library.yale.edu/catalog/11774879.