MLA

Kissinger, Henry, 1923-2023. Social Relations [course]. Box 76, folder 3. 1951. https://collections.library.yale.edu/catalog/11783825.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 76, folder 3"])(1951)[Social Relations [course]]. https://collections.library.yale.edu/catalog/11783825.