MLA

O'Neill, Eugene, 1888-1953. Wearing shorts sitting on beach. Box 111, folder 1982. 1928. https://collections.library.yale.edu/catalog/16582079.

APA, 6th edition

O'Neill, Eugene, 1888-1953. (["Box 111, folder 1982"])(1928)[Wearing shorts sitting on beach]. https://collections.library.yale.edu/catalog/16582079.