MLA

Kissinger, Henry, 1923-2023. Unidentified speech notes, excerpts and outlines. Box 254, folder 23. Undated, circa 1955-circa 1968. https://collections.library.yale.edu/catalog/11786662.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 254, folder 23"])(Undated, circa 1955-circa 1968)[Unidentified speech notes, excerpts and outlines]. https://collections.library.yale.edu/catalog/11786662.