MLA

Kissinger, Henry, 1923-2023. Anecdotal "color" papers-Helsinki and Aleksandr Solzhenitsyn, additional [2 of 2]. Box 209, folder 9. 1975-1998. https://collections.library.yale.edu/catalog/12480850.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 209, folder 9"])(1975-1998)[Anecdotal "color" papers-Helsinki and Aleksandr Solzhenitsyn, additional [2 of 2]]. https://collections.library.yale.edu/catalog/12480850.