1. Kothari , C.R(1990) ‘Research Methodology Methods and Techniques’, wishawa publisher second edition
2. Philip kotler and Kevin lane keller (2006) ‘ Marketing Management’, prentice hall of India pvt ltd twelfth edition
3. Stephen robbins (1996) ‘ Organizational Behaviors’ prentice Hall of India pvt ltd third edition
4. Dr.D.D. Sharma (2005) ‘Marketing Research’ sultan chand & sons Third edition