Messent, P. B. Mark Twain and male friendship. Oxford University Press.
Cita Chicago (17th ed.)Messent, Peter B. Mark Twain and Male Friendship. Oxford University Press.
Cita MLA (8th ed.)Messent, Peter B. Mark Twain and Male Friendship. Oxford University Press.
Atenció: Aquestes cites poden no estar 100% correctes.