Wieczynski, J. L. (1982). Oleg - Pardons in Russia and the Soviet Union. Acad. Int. Press.
Lua i Stíl Chicago (17ú heag.)Wieczynski, Joseph L. Oleg - Pardons in Russia and the Soviet Union. Gulf Breeze: Acad. Int. Press, 1982.
Lua MLA (8ú heag.)Wieczynski, Joseph L. Oleg - Pardons in Russia and the Soviet Union. Acad. Int. Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.