Laird, R. D., & Laird, B. A. (1970). Soviet communism and agrarian revolution. Harmondsworth: Penguin Books.
Lua i Stíl Chicago (17ú heag.)Laird, Roy D., agus Betty A. Laird. Soviet Communism and Agrarian Revolution. Harmondsworth: Penguin Books, 1970.
Lua MLA (8ú heag.)Laird, Roy D., agus Betty A. Laird. Soviet Communism and Agrarian Revolution. Harmondsworth: Penguin Books, 1970.
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