APA (7th ed.) Zitazioa
Haeger, J. D. (1991). John Jacob Astor: Business and Finance in the Early Republic. Wayne State University Press.
Chicago Style (17th ed.) Zitazioa
Haeger, John D. John Jacob Astor: Business and Finance in the Early Republic. Detroit: Wayne State University Press, 1991.
MLA (9th ed.) Zitazioa
Haeger, John D. John Jacob Astor: Business and Finance in the Early Republic. Wayne State University Press, 1991.
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