Cita APA (7a ed.)

Held, G., & Sarch, R. (1989). Data communications: A comprehensive approach (2nd ed.). McGraw-Hill Data Communications.

Cita Chicago Style (17a ed.)

Held, Gilbert, y Ray Sarch. Data Communications: A Comprehensive Approach. 2nd ed. New York, N.Y.: McGraw-Hill Data Communications, 1989.

Cita MLA (9a ed.)

Held, Gilbert, y Ray Sarch. Data Communications: A Comprehensive Approach. 2nd ed. McGraw-Hill Data Communications, 1989.