Blackman ,Jeff. (2003). Stop whining start selling. John Wiley & Sons.
Cita Chicago Style (17a ed.)Blackman ,Jeff. Stop Whining Start Selling. John Wiley & Sons, 2003.
Cita MLA (9a ed.)Blackman ,Jeff. Stop Whining Start Selling. John Wiley & Sons, 2003.
Precaución: Estas citas no son 100% exactas.