"E" general
MLA
Dunbar, Rudolph, 1899-1988. "E" general. Box 1, folder 12. 1942–1972. https://collections.library.yale.edu/catalog/17398727.
APA, 6th edition
Dunbar, Rudolph, 1899-1988. (["Box 1, folder 12"])(1942–1972)["E" general]. https://collections.library.yale.edu/catalog/17398727.