Sitting on beach smoking
MLA
O'Neill, Eugene, 1888-1953. Sitting on beach smoking. Box 110, folder 1906. 1936 May 16. https://collections.library.yale.edu/catalog/2021606.
APA, 6th edition
O'Neill, Eugene, 1888-1953. (["Box 110, folder 1906"])(1936 May 16)[Sitting on beach smoking]. https://collections.library.yale.edu/catalog/2021606.