Sorokin, G. (1967). Planning in the U.S.S.R.: Problems of theory. Progress Pub.
Lua i Stíl Chicago (17ú heag.)Sorokin, G. Planning in the U.S.S.R.: Problems of Theory. Moscow: Progress Pub, 1967.
Lua MLA (9ú heag.)Sorokin, G. Planning in the U.S.S.R.: Problems of Theory. Progress Pub, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.