MLA

Wilson, Edmund, 1895-1972. Arvin, Newton. Box 3, folder 62-64. 1942-62, n.d.. https://collections.library.yale.edu/catalog/17083216.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 3, folder 62-64"])(1942-62, n.d.)[Arvin, Newton]. https://collections.library.yale.edu/catalog/17083216.