Cita APA (7a ed.)

HALSALL FRED. (1989). DATA COMMUNICATIONS; COMPUTER NETWORKS AND OSI (2ND.). ADDISON-WESLEY.

Cita Chicago Style (17a ed.)

HALSALL FRED. DATA COMMUNICATIONS; COMPUTER NETWORKS AND OSI. 2ND. ENGLAND: ADDISON-WESLEY, 1989.

Cita MLA (9a ed.)

HALSALL FRED. DATA COMMUNICATIONS; COMPUTER NETWORKS AND OSI. 2ND. ADDISON-WESLEY, 1989.