Cita APA (7a ed.)

HALSALL FRED. (2004). DATA COMMUNICATIONS COMPUTER NETWORKS AND OPEN SYSTEMS (4TH.). PEARSON EDUCATION.

Cita Chicago Style (17a ed.)

HALSALL FRED. DATA COMMUNICATIONS COMPUTER NETWORKS AND OPEN SYSTEMS. 4TH. NEW DELHI: PEARSON EDUCATION, 2004.

Cita MLA (9a ed.)

HALSALL FRED. DATA COMMUNICATIONS COMPUTER NETWORKS AND OPEN SYSTEMS. 4TH. PEARSON EDUCATION, 2004.