MLA

Kissinger, Henry, 1923-2023. "Communist Parties in Western Europe," American Enterprise Institute (AEI) and Hoover Institution, Jun 9, 1977. Box 688, folder 3. 1977. https://collections.library.yale.edu/catalog/11781139.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 688, folder 3"])(1977)["Communist Parties in Western Europe," American Enterprise Institute (AEI) and Hoover Institution, Jun 9, 1977]. https://collections.library.yale.edu/catalog/11781139.