Cita APA (7th ed.)

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.