Covert Action
as Screenplay
1978
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California
as Screenplay
1977
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Keoma
as Screenplay
1976
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Young, Violent, Dangerous
as Screenplay
1976
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Carambola's Philosophy: In the Right Pocket
as Screenplay
1975
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Salvo D'Acquisto
as Screenplay
1974
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City Under Siege
as Writer
1974
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Carambola!
as Writer
1974
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The Master Touch
as Writer
1972
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The Pisciotta Case
as Screenplay
1972
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Matalo! (Kill Him)
as Writer
1970
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