Tohutoro APA (7th ed.)
Madsen, A. (2001). John Jacob Astor: America's first multimillionaire. John Wiley.
Tohutoru Kātū Chicago (17th ed.)
Madsen, Axel. John Jacob Astor: America's First Multimillionaire. New York: John Wiley, 2001.
Tohutoro MLA (9th ed.)
Madsen, Axel. John Jacob Astor: America's First Multimillionaire. John Wiley, 2001.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.