(1999). Effective Business Communications Pocketbook. Thorogood Publishing Ltd.
Cita Chicago Style (17a ed.)Effective Business Communications Pocketbook. Thorogood Publishing Ltd, 1999.
Cita MLA (8a ed.)Effective Business Communications Pocketbook. Thorogood Publishing Ltd, 1999.
Precaución: Estas citas no son 100% exactas.