Source, in full
The popular attribution to Goldwyn is false according to his biographer in A. Scott Berg, Goldwyn: A Biography (1998). The earliest known print attribution is to Moss Hart in Van Wert (Ohio) Times Bulletin (26 August 1954) as cited in Fred Shapiro, The Yale Book of Quotations (2006). Also attributed to Humphrey Bogart in Stephen Humphrey Bogart, Bogart: In Search of My Father (1995), and to Ernest Hemingway in James R. Mellow, Hemingway: A Life Without Consequences (1992).