Christopher M Andrew and Vasili Mitrokhin (2005). The World Was Going Our Way: The KGB and the Battle for the Third World. Basic Books. pp. p.409. பன்னாட்டுத் தரப்புத்தக எண்0-465-00311-7.
National Foreign Assessment Center (1987). Chiefs of State and Cabinet members of foreign governments (in ஆங்கிலம்). Washington, DC: Central Intelligence Agency. p. 1. hdl:2027/uc1.c050186243.
National Foreign Assessment Center (1988). Chiefs of State and Cabinet members of foreign governments (in ஆங்கிலம்). Washington, DC: Central Intelligence Agency. p. 1. hdl:2027/osu.32435024019804.