Citazione Stile APA (7a Edizione)

Held, G. (1996). Understanding Data communications (4th.). P H I.

Citazione stile Chigago Style (17a edizione)

Held, Gilbert. Understanding Data Communications. 4th. New Delhi: P H I, 1996.

Citatione MLA (9a ed.)

Held, Gilbert. Understanding Data Communications. 4th. P H I, 1996.