Rujukan Sam_Warner

  1. ↑ "Wielcy Polacy - Warner Bros czyli bracia Warner: Aaron (Albert), Szmul (Sam) i Hirsz (Harry) Wonsal oraz Jack (Itzhak) Wonsal - Białczyński". 22 April 2016. Dicapai 16 November 2017. 
  2. ↑ Thomas (1990), pp. 52–62.
  3. ↑ "Warner, Movie Magnate, Dies: Sam Warner, Former Youngstown Man, Rose from Obscurity to Leader in Field". The Youngstown Daily Vindicator. October 5, 1927.