MLA

Wilson, Edmund, 1895-1972. Mumm, Olili. Box 49, folder 1327. 1947-58. https://collections.library.yale.edu/catalog/17083231.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 49, folder 1327"])(1947-58)[Mumm, Olili]. https://collections.library.yale.edu/catalog/17083231.