MLA

Kissinger, Henry, 1923-2023. Transcript of interview with Günter Gaus. Box 254, folder 19. Undated, circa 1955-circa 1968. https://collections.library.yale.edu/catalog/11786658.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 254, folder 19"])(Undated, circa 1955-circa 1968)[Transcript of interview with Günter Gaus]. https://collections.library.yale.edu/catalog/11786658.