Mcsharry,Patrick. (2001). Everyday Numbers. Helicon Publishing Ltd.
Cita Chicago (17th ed.)Mcsharry,Patrick. Everyday Numbers. Great Britain: Helicon Publishing Ltd, 2001.
Cita MLA (8th ed.)Mcsharry,Patrick. Everyday Numbers. Helicon Publishing Ltd, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.