MLA

Nugent, Bruce, 1906-1987. Schlick, Robert. Box 13. 1942-1948. https://collections.library.yale.edu/catalog/16814011.

APA, 6th edition

Nugent, Bruce, 1906-1987. (["Box 13"])(1942-1948)[Schlick, Robert]. https://collections.library.yale.edu/catalog/16814011.