(1995). Cybersource. Ziff-Davis Press.
Cita Chicago (17th ed.)Cybersource. Emeryville, Calif: Ziff-Davis Press, 1995.
Cita MLA (9th ed.)Cybersource. Ziff-Davis Press, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)