MLA

Hollander, John, 1929-2013. Perle, George. Box 4. 1974-1981. https://collections.library.yale.edu/catalog/32266128.

APA, 6th edition

Hollander, John, 1929-2013. (["Box 4"])(1974-1981)[Perle, George]. https://collections.library.yale.edu/catalog/32266128.