Standing on balcony (4 versions)
MLA
O'Neill, Eugene, 1888-1953. Standing on balcony (4 versions). Box 110, folder 1937. 1946 Aug 15. https://collections.library.yale.edu/catalog/2013218.
APA, 6th edition
O'Neill, Eugene, 1888-1953. (["Box 110, folder 1937"])(1946 Aug 15)[Standing on balcony (4 versions)]. https://collections.library.yale.edu/catalog/2013218.