Bolshevism or Communism: On the Question of a New Communist Party and the “Fourth” International. – Chicago: United Workers Party of America, 1934.
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- Bolshevismo ou Comunismo – Paul Mattick
[Bolshevism or Communism]
World-Wide Fascism or World Revolution, Chicago, March 1934, 26 p.
What next for the American Workers?. – Chicago: United Workers Party, 1934. – 29 p.
- O que se segue para os trabalhadores americanos? (Em Breve)
[What next for the American Workers?]
The Inevitability of Communism, 1935.
- A Inevitabilidade do Comunismo – Paul Mattick (Em Breve)
[The Inevitability of Communism]