MLA

Kissinger, Henry, 1923-2023. Bla. Box 306, folder 5. 1970-1973. https://collections.library.yale.edu/catalog/11774583.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 306, folder 5"])(1970-1973)[Bla]. https://collections.library.yale.edu/catalog/11774583.