Ericson, R. E. (1990). The Soviet Union, 1979-1990. ICS Press.
Lua i Stíl Chicago (17ú heag.)Ericson, Richard Eric. The Soviet Union, 1979-1990. San Francisco, Calif.: ICS Press, 1990.
Lua MLA (8ú heag.)Ericson, Richard Eric. The Soviet Union, 1979-1990. ICS Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.