MLA

Kissinger, Henry, 1923-2023. "New Agents" outline. Box 253, folder 26. Undated, circa 1955-circa 1968. https://collections.library.yale.edu/catalog/11786637.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 253, folder 26"])(Undated, circa 1955-circa 1968)["New Agents" outline]. https://collections.library.yale.edu/catalog/11786637.