Cita APA (7th ed.)
Ludlum, R. (1990). The Bourne ultimatum. Random House.
Cita Chicago (17th ed.)
Ludlum, Robert. The Bourne Ultimatum. New York: Random House, 1990.
Cita MLA (9th ed.)
Ludlum, Robert. The Bourne Ultimatum. Random House, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.