MLA

Kissinger, Henry, 1923-2023. Walters, Vernon A.-memoranda. Box 346, folder 2. 1968. https://collections.library.yale.edu/catalog/11775187.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 346, folder 2"])(1968)[Walters, Vernon A.-memoranda]. https://collections.library.yale.edu/catalog/11775187.