Gregory Paul R,Stuart Robert C. (1990). Soviet Economic Structure and Performance (4th.). Harper collins Pub.
Lua i Stíl Chicago (17ú heag.)Gregory Paul R,Stuart Robert C. Soviet Economic Structure and Performance. 4th. New York: Harper collins Pub, 1990.
Lua MLA (9ú heag.)Gregory Paul R,Stuart Robert C. Soviet Economic Structure and Performance. 4th. Harper collins Pub, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.