MLA

Kissinger, Henry, 1923-2023. New-Ney. Box 123, folder 1. 2006. https://collections.library.yale.edu/catalog/12479580.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 123, folder 1"])(2006)[New-Ney]. https://collections.library.yale.edu/catalog/12479580.