Singleton, L. A. (1989). Global impact: The new telecommunication technologies. Harper & Row.
Cita Chicago (17th ed.)Singleton, Loy A. Global Impact: The New Telecommunication Technologies. New York: Harper & Row, 1989.
Cita MLA (9th ed.)Singleton, Loy A. Global Impact: The New Telecommunication Technologies. Harper & Row, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.