MLA

Kissinger, Henry, 1923-2023. von Kuehnelt-Leddihn, Erik R.. Box 61, folder 16. 1958-1960. https://collections.library.yale.edu/catalog/11783571.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 61, folder 16"])(1958-1960)[von Kuehnelt-Leddihn, Erik R.]. https://collections.library.yale.edu/catalog/11783571.