* John Jacob Astor Business Records at Baker Library Historical Collections, Harvard Business School* The Waldorf Astoria Hotel* The "Astorhaus" in Germany, now a museum* German Society of the City of New York* "Astoria", Author Washington Irving full text (pdf)* Frontline show
McFarland, 2004==External links==*John Jacob Astor Business Records at Baker Library Historical Collections, Harvard Business School*The Waldorf Astoria Hotel*The "Astorhaus" in Germany, now a museum*German Society of the City of New York*"Astoria", Author Washington Irving full text (pdf)*Frontline show* National Portrait Gallery