Wilhelm, D. (1977). Creative alternatives to communism: Guidelines to tomorrow's world. London: Macmillan.
Lua i Stíl Chicago (17ú heag.)Wilhelm, Donald. Creative Alternatives to Communism: Guidelines to Tomorrow's World. London: Macmillan, 1977.
Lua MLA (8ú heag.)Wilhelm, Donald. Creative Alternatives to Communism: Guidelines to Tomorrow's World. London: Macmillan, 1977.
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