Emmerson P. Paul. (2006). Essential Business Grammar Builder: For class and self study. Oxford, Macmillan, 2006.
Cita Chicago (17th ed.)Emmerson P. Paul. Essential Business Grammar Builder: For Class and Self Study. Oxford, Macmillan, 2006, 2006.
Cita MLA (9th ed.)Emmerson P. Paul. Essential Business Grammar Builder: For Class and Self Study. Oxford, Macmillan, 2006, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.