Frohman and Marcosson, p. 386; Preston, p. 204; "Frohman, Charles" （页面存档备份，存于互联网档案馆）. The Lusitania Resource; Zecher, p. 462.
Ellis, Frederick D. The Tragedy of the Lusitania (National Publishing Company, 1915), pp. 38–39; Preston, p. 204; "Frohman Calm; Not Concerned About Death, Welcomed It as Beautiful Adventure, He Told Friends at End," New York Tribune, May 11, 1915, p. 3; Frohman and Marcosson, p. 387; Frohman, Charles. The Lusitania Resource" （页面存档备份，存于互联网档案馆）
Frohman and Marcosson, p. 387; Survivor discovering Frohman's body quoted in Hoehling, Adolph A., The Last Voyage of the Lusitania (Random House Value Publishing, 1991), pp. 217–18; Ramsey, David, Lusitania, Saga and Myth (W. W. Norton & Company, 2001), pp. 96–97; New York American, May 9, 1915, p. 1; New York Press, "Finds Frohman's Body", May 9, 1915, p. 5; "Charles Frohman" （页面存档备份，存于互联网档案馆）. The Lusitania Resource; Zecher, p. 443.
Frohman and Marcosson, p. 386; Preston, p. 204; "Frohman, Charles" （页面存档备份，存于互联网档案馆）. The Lusitania Resource; Zecher, p. 462.
Ellis, Frederick D. The Tragedy of the Lusitania (National Publishing Company, 1915), pp. 38–39; Preston, p. 204; "Frohman Calm; Not Concerned About Death, Welcomed It as Beautiful Adventure, He Told Friends at End," New York Tribune, May 11, 1915, p. 3; Frohman and Marcosson, p. 387; Frohman, Charles. The Lusitania Resource" （页面存档备份，存于互联网档案馆）
Frohman and Marcosson, p. 387; Survivor discovering Frohman's body quoted in Hoehling, Adolph A., The Last Voyage of the Lusitania (Random House Value Publishing, 1991), pp. 217–18; Ramsey, David, Lusitania, Saga and Myth (W. W. Norton & Company, 2001), pp. 96–97; New York American, May 9, 1915, p. 1; New York Press, "Finds Frohman's Body", May 9, 1915, p. 5; "Charles Frohman" （页面存档备份，存于互联网档案馆）. The Lusitania Resource; Zecher, p. 443.
