MLA

O'Neill, Eugene, 1888-1953. Henri Christophe, King of Haiti. Portrait from The Illustrated London News, 1934 May 31. Box 113, folder 2079. n.d.. https://collections.library.yale.edu/catalog/2068430.

APA, 6th edition

O'Neill, Eugene, 1888-1953. (["Box 113, folder 2079"])(n.d.)[Henri Christophe, King of Haiti. Portrait from The Illustrated London News, 1934 May 31]. https://collections.library.yale.edu/catalog/2068430.