Cita APA (7th ed.)

Quirk, T. (2007). Mark Twain and human nature. University of Missouri Press.

Cita Chicago (17th ed.)

Quirk, Tom. Mark Twain and Human Nature. Columbia: University of Missouri Press, 2007.

Cita MLA (9th ed.)

Quirk, Tom. Mark Twain and Human Nature. University of Missouri Press, 2007.