Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | The Godfather | 1972 | |
| Writer | The Godfather: Part III | 1990 | |
| Writer | Superman | 1978 | |
| Writer | Superman II | 1980 | |
| Writer | Earthquake | 1974 |
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | The Godfather | 1972 | |
| Writer | The Godfather: Part III | 1990 | |
| Writer | Superman | 1978 | |
| Writer | Superman II | 1980 | |
| Writer | Earthquake | 1974 |