APA

Halsall (Fred), . (2001). "Data Communications,Computer Networks And Open Systems". : .

Chicago

Halsall (Fred), . 2001. "Data Communications,Computer Networks And Open Systems". : .

Harvard

Halsall (Fred), . (2001). "Data Communications,Computer Networks And Open Systems". : .

MLA

Halsall (Fred), . "Data Communications,Computer Networks And Open Systems". : . 2001.