The conversation, c1974: credits (Allen Garfield)

The state of things, c1982: credits (Allen Goorwitz)

Katz, E. Film encyclopedia, c1994: p. 507 (Allen Garfield; b. Allen Goorwitz, Nov. 22, 1939; from 1978 through 1983 was billed as Allen Goorwitz)

IMDb, October 26, 2017: (Allen Garfield, actor, writer ; b. November 22, 1939 in Newark, New Jersey, USA ; alternate names: Alan Garfield, Alen Garfield, Allan Goorwitz, Allen Goorwitz)

Hollywood Reporter, April 7, 2020 (Allen Garfield; Actress Ronee Blakley posted the news of Garfield's death on Facebook, saying that he had died Tuesday [April 7, 2020] and that the cause was COVID-19)