MLA

Van Vechten, Carl, 1880-1964. Knopf, Alfred A., Jr., outside the Arsenal at Central Park, New York City. Box 357, folder 4865. 1935 December 30. https://collections.library.yale.edu/catalog/2054993.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 357, folder 4865"])(1935 December 30)[Knopf, Alfred A., Jr., outside the Arsenal at Central Park, New York City]. https://collections.library.yale.edu/catalog/2054993.