Knopf, Alfred A., Sr., and Blanche Knopf
MLA
Van Vechten, Carl, 1880-1964. Knopf, Alfred A., Sr., and Blanche Knopf. Box 357 | Folder 4868. 1932 April 4. https://collections.library.yale.edu/catalog/2001993.
APA, 6th edition
Van Vechten, Carl, 1880-1964. (["Box 357 | Folder 4868"])(1932 April 4)[Knopf, Alfred A., Sr., and Blanche Knopf]. https://collections.library.yale.edu/catalog/2001993.