MLA

O'Neill, Eugene, 1888-1953. Group sitting on beach: Lawrence Langner, Fania Marinoff Van Vechten, Eugene O'Neill, Armina Marshall. Box 110, folder 1908. [1936 May 16]. https://collections.library.yale.edu/catalog/2026497.

APA, 6th edition

O'Neill, Eugene, 1888-1953. (["Box 110, folder 1908"])([1936 May 16])[Group sitting on beach: Lawrence Langner, Fania Marinoff Van Vechten, Eugene O'Neill, Armina Marshall]. https://collections.library.yale.edu/catalog/2026497.