Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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