John Jacob Astor IV, in Encyclopedia Titanica. URL consultato il 27 ottobre 2010.
«Colonel John Jacob Astor IV was born in Rhinebeck, New York on July 13th, 1864 the son of William Astor and great-grandson of John Jacob Astor the fur trader. Astor was educated at St. Paul's School, Concord and later went to Harvard. After a period of travelling abroad (1888–91) he returned to the United States to manage the family fortune. He had homes at 840 Fifth Avenue, New York and at Ferncliff, Rhinebeck, New York.....»