Antzeko izenburuak: Black Book - MCI Communications Corporation (1983)
- Black Book - MCI Communications Corporation (1981)
- Black Book - MCI Communications Corporation (1984)
- Black Book - MCI Communications Corporation (May 1982)
- Black Book - MCI Communications Corporation (October 1982)
- Black Book - MCI Communications Corporation (January 1981)
- Black Book - MCI World.com; Positioned to Win in a Data-Driven World