Shay, W. A. (1999). Understanding data communications and networks (2nd ed.). PWS.
Cita Chicago (17th ed.)Shay, William A. Understanding Data Communications and Networks. 2nd ed. Pacific Grove, Calif: PWS, 1999.
Cita MLA (9th ed.)Shay, William A. Understanding Data Communications and Networks. 2nd ed. PWS, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.