MLA

Murphy, Gerald, 1888-1964. Sara Murphy, Fernand Léger, Archibald MacLeish, Ada MacLeish, Marie Bissell, Dick Myers, and others before and during the Paper Ball, Hartford, Connecticut. Box 32, folder 616. 1936 February. https://collections.library.yale.edu/catalog/12306382.

APA, 6th edition

Murphy, Gerald, 1888-1964. (["Box 32, folder 616"])(1936 February)[Sara Murphy, Fernand Léger, Archibald MacLeish, Ada MacLeish, Marie Bissell, Dick Myers, and others before and during the Paper Ball, Hartford, Connecticut]. https://collections.library.yale.edu/catalog/12306382.