Knopf, Alfred A., Sr., at the Knopf family home, Purchase, New York
MLA
Van Vechten, Carl, 1880-1964. Knopf, Alfred A., Sr., at the Knopf family home, Purchase, New York. Box 357 | Folder 4870. 1952 September 28. https://collections.library.yale.edu/catalog/2055050.
APA, 6th edition
Van Vechten, Carl, 1880-1964. (["Box 357 | Folder 4870"])(1952 September 28)[Knopf, Alfred A., Sr., at the Knopf family home, Purchase, New York]. https://collections.library.yale.edu/catalog/2055050.