MLA

Kissinger, Henry, 1923-2023. Mc. Box 408, folder 6. 1976-1978. https://collections.library.yale.edu/catalog/11777407.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 408, folder 6"])(1976-1978)[Mc]. https://collections.library.yale.edu/catalog/11777407.