CRM can be used throughout the customer life-cycle stages of customer acquisition, retention and development and how the management disciplines- marketing, sales, IT, change management, human resource, customer service, accounting, and strategic management are implicated in this.
You can refer book for Associate - CRM.
Book Name-Customer Relationship Management
Author Name-by Francis Buttle
Price-Rs.500 (approximately)
Link : http://www.amazon.in/Customer-Relationship-Management-Francis-Buttle/dp/1856175227