APA Citation

Madsen, A. (2001). John Jacob Astor: America's first multimillionaire. New York: John Wiley.

Chicago Style Citation

Madsen, Axel. John Jacob Astor: America's First Multimillionaire. New York: John Wiley, 2001.

MLA Citation

Madsen, Axel. John Jacob Astor: America's First Multimillionaire. New York: John Wiley, 2001.

Warning: These citations may not always be 100% accurate.