| * | November 7, 1897 New York City, New York, USA | |
| as Herman Jacob Mankiewicz | ||
| † | March 5, 1953 Hollywood, Los Angeles, California, USA |
|
Tom Pendergast, Sara Pendergast (eds.) International Dictionary of Films and Filmmakers, 4. Writers and Production Artists Detroit/New York/San Francisco/London/Boston/Woodbridge, CT, 2000 |
|
Glenn Mitchell The Marx Brothers Encyclopedia London, 1996 |