- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)6
- Pacepa, Ion Mihai3
- Le Carré, John2
- Agee, Philip1
- Akhmedov, Ismail1
- Brown, Anthony Cave1
- Earley, Pete1
- Fowells, Gavin1
- Meyer, Cord1
- Mitrokhin, Vasili Nikitich1
- Ophüls, Marcel1
- Radio Free Europe/Radio Liberty, Inc - Research Institute1
- Reiss, Bob1
- Sudoplatov, Pavel1
- Wise, David1
- Wright, Peter1