Cita APA (7th ed.)

FREER, J. R. (1990). COMPUTER COMMUNICATIONS AND NETWORKS. MCGRAW HILL.

Cita Chicago (17th ed.)

FREER, J R. COMPUTER COMMUNICATIONS AND NETWORKS. -: MCGRAW HILL, 1990.

Cita MLA (9th ed.)

FREER, J R. COMPUTER COMMUNICATIONS AND NETWORKS. MCGRAW HILL, 1990.