Spence, G. (1995). How to argue and win everytime. Martin`s.
Cita Chicago (17th ed.)Spence, Gressy. How to Argue and Win Everytime. New York: Martin`s, 1995.
Cita MLA (9th ed.)Spence, Gressy. How to Argue and Win Everytime. Martin`s, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.