MLA

Emerson, Thomas I. (Thomas Irwin), 1907-1991. Volume I [investigation of Emerson when he was being considered for a position in the Department of Justice]. Box 75, folder 17 - 19. 1941. https://collections.library.yale.edu/catalog/10014740.

APA, 6th edition

Emerson, Thomas I. (Thomas Irwin), 1907-1991. (["Box 75, folder 17 - 19"])(1941)[Volume I [investigation of Emerson when he was being considered for a position in the Department of Justice]]. https://collections.library.yale.edu/catalog/10014740.