MLA

Kissinger, Henry, 1923-2023. Anecdotal "color" papers-Helsinki and Aleksandr Solzhenitsyn. Box 209, folder 7. 1975, 1998, undated. https://collections.library.yale.edu/catalog/12480846.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 209, folder 7"])(1975, 1998, undated)[Anecdotal "color" papers-Helsinki and Aleksandr Solzhenitsyn]. https://collections.library.yale.edu/catalog/12480846.