 Hotel Laguna2001 · Writer | Writer |
 Via del Corso2000 · Writer | Writer |
 Si fa presto a dire amore2000 · Writer, Screenplay | Writer, Screenplay |
 Forever1991 · Producer, Screenplay | Producer, Screenplay |
 White Hunter1990 · Director, Writer, Producer | Director, Writer, Producer |
 Nosferatu in Venice1988 · Director, Producer, Screenplay | Director, Producer, Screenplay |
 All for the Moral Majority!1984 · Screenplay, Producer | Screenplay, Producer |
 Neapolitan Story1983 · Screenplay | Screenplay |
 The Secret of Seagull Island1982 · Writer | Writer |
 The Precarious Bank Teller1980 · Screenplay | Screenplay |
 Riavanti… Marsch!1979 · Screenplay | Screenplay |
 L'anello matrimoniale1979 · Screenplay | Screenplay |
 Rock 'n Roll1978 · Screenplay | Screenplay |
 The Witness1978 · Writer | Writer |
 The Cat1977 · Screenplay | Screenplay |
 L'altra metà del cielo1977 · Screenplay | Screenplay |
 The Two Missionaries1974 · Screenplay | Screenplay |
 The Great Kidnapping1973 · Screenplay | Screenplay |
 Società a responsabilità molto limitata1973 · Writer | Writer |
 Brothers Blue1973 · Writer | Writer |
 Increase and Multiply1973 · Writer | Writer |
 Seduction Squad1972 · Writer | Writer |
 The Tough and the Mighty1969 · Screenplay | Screenplay |
 The Vatican Affair1968 · Screenplay | Screenplay |
 Five Days in Sinai1968 · Writer | Writer |
 Death Rides Along1967 · Screenplay | Screenplay |
 Halleluja for Django1967 · Screenplay | Screenplay |
 Grand Slam1967 · Screenplay | Screenplay |
 The Last Killer1967 · Writer | Writer |
 Poker with Pistols1967 · Writer | Writer |
 You Only Die Once1967 · Writer | Writer |
 Pecos Cleans Up1967 · Screenplay | Screenplay |
 Soldati e capelloni1967 · Writer | Writer |
 Long Days of Vengeance1967 · Screenplay | Screenplay |
 Our Men in Bagdad1966 · Writer | Writer |
