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.
Atenció: Aquestes cites poden no estar 100% correctes.