MLA

Cox, Christopher, 1949-1990. Rutgers University. Box 39, folder 585. 1988. https://collections.library.yale.edu/catalog/16879204.

APA, 6th edition

Cox, Christopher, 1949-1990. (["Box 39, folder 585"])(1988)[Rutgers University]. https://collections.library.yale.edu/catalog/16879204.