MLA

Kissinger, Henry, 1923-2023. Bla. Box 6, folder 11. 1955-1969. https://collections.library.yale.edu/catalog/11782373.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 6, folder 11"])(1955-1969)[Bla]. https://collections.library.yale.edu/catalog/11782373.