Cita APA (7th ed.)

Kaplan, J. (1974). Mark Twain and his world. Simon and Schuster.

Cita Chicago (17th ed.)

Kaplan, Justin. Mark Twain and His World. New York: Simon and Schuster, 1974.

Cita MLA (9th ed.)

Kaplan, Justin. Mark Twain and His World. Simon and Schuster, 1974.