Cita APA (7th ed.)

Ludlum, R. (1990). The bourne ultimatum. Bantam Books.

Cita Chicago (17th ed.)

Ludlum, Robert. The Bourne Ultimatum. New York: Bantam Books, 1990.

Cita MLA (9th ed.)

Ludlum, Robert. The Bourne Ultimatum. Bantam Books, 1990.