Frey, S. W. (1997). The vulture fund. A Signet Book.
Cita Chicago (17th ed.)Frey, Stephen W. The Vulture Fund. New York: A Signet Book, 1997.
Cita MLA (9th ed.)Frey, Stephen W. The Vulture Fund. A Signet Book, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.