Kaplan, J. (1966). Mr. Clemens and Mark Twain: A biography. Simon and Schuster.
Lua i Stíl Chicago (17ú heag.)Kaplan, Justin. Mr. Clemens and Mark Twain: A Biography. New York: Simon and Schuster, 1966.
Lua MLA (9ú heag.)Kaplan, Justin. Mr. Clemens and Mark Twain: A Biography. Simon and Schuster, 1966.
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