Conrad and Others
MLA
Conrad, Joseph, 1857-1924. Conrad and Others. Box 40. 1862-1927, undated. https://collections.library.yale.edu/catalog/2002622.
APA, 6th edition
Conrad, Joseph, 1857-1924. (["Box 40"])(1862-1927, undated)[Conrad and Others]. https://collections.library.yale.edu/catalog/2002622.