Cita APA

 Greenberg, P. (2010).  CRM at the speed of light: Social CRM strategies, tools, and techniques for engaging your customers.  McGraw-Hill.

Chicago Style Citation

 Greenberg, Paul.  CRM At the Speed of Light: Social CRM Strategies, Tools, and Techniques for Engaging Your Customers.  McGraw-Hill, 2010.

Cita MLA

 Greenberg, Paul.  CRM At the Speed of Light: Social CRM Strategies, Tools, and Techniques for Engaging Your Customers.  McGraw-Hill, 2010.