Heldman, R. K. (1993). Future telecommunications: Information applications, services & infrastructure. Washington, D.C: McGraw-Hill.
Chicago ZitierstilHeldman, Robert K. Future Telecommunications: Information Applications, Services & Infrastructure. Washington, D.C: McGraw-Hill, 1993.
MLA ZitierstilHeldman, Robert K. Future Telecommunications: Information Applications, Services & Infrastructure. Washington, D.C: McGraw-Hill, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.