MLA

Kissinger, Henry, 1923-2023. Wieck, Georg. Box 63, folder 12. 1963. https://collections.library.yale.edu/catalog/11783617.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 63, folder 12"])(1963)[Wieck, Georg]. https://collections.library.yale.edu/catalog/11783617.