Cite

Sitting on porch of Monte Cristo Cottage (New London, Conn.) with James O'Neill, Jr. and James O'Neill, [1898] (copy)

MLA

O'Neill, Eugene, 1888-1953. Sitting on porch of Monte Cristo Cottage (New London, Conn.) with James O'Neill, Jr. and James O'Neill, [1898] (copy). Box 17, folder 280. undated. https://collections.library.yale.edu/catalog/2004995.

APA, 6th edition

O'Neill, Eugene, 1888-1953. (["Box 17, folder 280"])(undated)[Sitting on porch of Monte Cristo Cottage (New London, Conn.) with James O'Neill, Jr. and James O'Neill, [1898] (copy)]. https://collections.library.yale.edu/catalog/2004995.