Cita APA (7th ed.)

Kaplan, J. (1966). Mr. Clemens and Mark Twain: A biography. Simon and Schuster.

Cita Chicago (17th ed.)

Kaplan, Justin. Mr. Clemens and Mark Twain: A Biography. New York: Simon and Schuster, 1966.

Cita MLA (9th ed.)

Kaplan, Justin. Mr. Clemens and Mark Twain: A Biography. Simon and Schuster, 1966.