McCauley, M. (1998). Gorbachev. Longman.
Lua i Stíl Chicago (17ú heag.)McCauley, Martin. Gorbachev. London: Longman, 1998.
Lua MLA (9ú heag.)McCauley, Martin. Gorbachev. Longman, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.