MLA

Kissinger, Henry, 1923-2023. Yugoslavia. Box 166, folder 9. 1970-1978. https://collections.library.yale.edu/catalog/12481262.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 166, folder 9"])(1970-1978)[Yugoslavia]. https://collections.library.yale.edu/catalog/12481262.