un film prodotto da Mario Cecchi Gori per la Fairfilm, Incei Film, Sancro Film ; soggetto e sceneggiatura di Dino Risi, Ettore Scola, Ruggero Maccari ; un film di Dino Risi
Janus Films ; mk2 diffusion ; written and directed by Charles Chaplin ; assistant directors, Harry Crocker, Henry Bergman, Albert Austin ; [produced by Charles Chaplin]
Janus Films ; an Anglia Television & Gordon Feedman production ; an Errol Morris film ; executive producer, Gordon Freedman ; produced by David Hickman ; directed by Errol Morris ; produced in association with NBC, Tokyo Broadcasting System & Channel Four, UK ; Triton Pictures