Parkinson, F. W. « Christopher Andrew and Oleg Gordievsky, Instructions from the Centre: Top Secret Files on KGB Foreign Operations, 1975-1985 ». Journal of Conflict Studies 13, no. 2 (mars 3, 1993). Consulté le juillet 17, 2024. https://journals.lib.unb.ca/index.php/JCS/article/view/15123.