MLA

Kissinger, Henry, 1923-2023. "The Huddle" newsletter. Box 115, folder 11. 1947. https://collections.library.yale.edu/catalog/11784338.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 115, folder 11"])(1947)["The Huddle" newsletter]. https://collections.library.yale.edu/catalog/11784338.