Shusett, Ronald (Autor Personal)

Foster, A. D. Alien, c1979 (a.e.) t.p. (Ronald Shusett)

Internet Movie Database WWW site, March 24, 2016: (Ronald Shusett, writer, producer ; b. Pittsburgh, Pennsylvania, USA)

Wikipedia, viewed June 30, 2022 (Ronald Shusett (born June 1935) is an American motion picture screenwriter and producer, usually in the science fiction genre) https://en.wikipedia.org/wiki/Ronald_Shusett