United States. Central Intelligence Agency. Directorate of Intelligence. (1984). Directory of officials of the Bulgarian People's Republic: A reference aid. The Directorate.
Chicago Style (17th ed.) CitationUnited States. Central Intelligence Agency. Directorate of Intelligence. Directory of Officials of the Bulgarian People's Republic: A Reference Aid. [Washington, D.C.?]: The Directorate, 1984.
MLA (9th ed.) CitationUnited States. Central Intelligence Agency. Directorate of Intelligence. Directory of Officials of the Bulgarian People's Republic: A Reference Aid. The Directorate, 1984.
Warning: These citations may not always be 100% accurate.