MLA

Kissinger, Henry, 1923-2023. "Germany-Core of the European Problem," AFL-CIO Conference on World Affairs, Apr 19-20, 1960. Box 246, folder 12. 1960 April-June. https://collections.library.yale.edu/catalog/11786439.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 246, folder 12"])(1960 April-June)["Germany-Core of the European Problem," AFL-CIO Conference on World Affairs, Apr 19-20, 1960]. https://collections.library.yale.edu/catalog/11786439.