MLA

Zilboorg, James, 1892-1968. "A" general. Box 1, folder 1. 1914-1948. https://collections.library.yale.edu/catalog/17096125.

APA, 6th edition

Zilboorg, James, 1892-1968. (["Box 1, folder 1"])(1914-1948)["A" general]. https://collections.library.yale.edu/catalog/17096125.