Sitting in yard (3 versions) and standing near side of house
MLA
O'Neill, Eugene, 1888-1953. Sitting in yard (3 versions) and standing near side of house. Box 110, folder 1922. 1941 Jun. https://collections.library.yale.edu/catalog/2013622.
APA, 6th edition
O'Neill, Eugene, 1888-1953. (["Box 110, folder 1922"])(1941 Jun)[Sitting in yard (3 versions) and standing near side of house]. https://collections.library.yale.edu/catalog/2013622.