Held, G. (2002). Understanding data communications (7th ed.). Addison-Wesley, ; Pearson Education.
Chicago Style (17th ed.) CitationHeld, Gilbert. Understanding Data Communications. 7th ed. Boston : New Delhi: Addison-Wesley, ; Pearson Education, 2002.
ציטוט MLAHeld, Gilbert. Understanding Data Communications. 7th ed. Addison-Wesley, ; Pearson Education, 2002.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.