Greenblatt, D. (2003). The call heard 'round the world: Voice over Internet Protocol and the quest for convergence. AMACOM, American Management Association.
Chicago-Zitierstil (17. Ausg.)Greenblatt, David. The Call Heard 'Round the World: Voice over Internet Protocol and the Quest for Convergence. New York: AMACOM, American Management Association, 2003.
MLA-Zitierstil (9. Ausg.)Greenblatt, David. The Call Heard 'Round the World: Voice over Internet Protocol and the Quest for Convergence. AMACOM, American Management Association, 2003.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.