MLA

Kissinger, Henry, 1923-2023. American Political Science Association (APSA) annual meeting, Sep 6-8, 1956. Box 79, folder 11. 1956 September. https://collections.library.yale.edu/catalog/11783854.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 79, folder 11"])(1956 September)[American Political Science Association (APSA) annual meeting, Sep 6-8, 1956]. https://collections.library.yale.edu/catalog/11783854.