Matthews, H. L. (1969). Political leaders of the Twentieth Castro: A political biography. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Matthews, Herbert L. Political Leaders of the Twentieth Castro: A Political Biography. Inglaterra: Penguin Books, 1969.
Lua MLA (9ú heag.)Matthews, Herbert L. Political Leaders of the Twentieth Castro: A Political Biography. Penguin Books, 1969.
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