APA Style

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

MLA Style

Greenberg, Paul. "CRM at the speed of light : social CRM strategies, tools, and techniques for engaging your customers. Fourth Edition". Fourth Edition New York: McGraw-Hill, 2010. Text.