MLA

Kissinger, Henry, 1923-2023. Outline of Subpanels. Box 137, folder 1. 1956 September-October. https://collections.library.yale.edu/catalog/11784755.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 137, folder 1"])(1956 September-October)[Outline of Subpanels]. https://collections.library.yale.edu/catalog/11784755.