Du Bois, W. E. B. (William Edward Burghardt)
MLA
Johnson, James Weldon, 1871-1938. Du Bois, W. E. B. (William Edward Burghardt). Box 6, folder 137. 1931-38, undated. https://collections.library.yale.edu/catalog/16747983.
APA, 6th edition
Johnson, James Weldon, 1871-1938. (["Box 6, folder 137"])(1931-38, undated)[Du Bois, W. E. B. (William Edward Burghardt)]. https://collections.library.yale.edu/catalog/16747983.