I may suggest the following:

Social Research Methods, 4th Edition 4th Edition

by Alan Bryman (Author)

Social Science Research: Principles, Methods, and Practices

Understanding Research Methods: An Overview of the Essentials

Mildred L. Patten

I may suggest the following:

Social Research Methods, 4th Edition 4th Edition

by Alan Bryman (Author)

Social Science Research: Principles, Methods, and Practices

Understanding Research Methods: An Overview of the Essentials

Mildred L. Patten

you can find many books :

1. Marketing Research by Naresh Malhotra

2. Research Methodology by Deepak Chawla and Neena Sondhi

many are readily available on internet in PDF downloadable format

Pratiksha

The following text books on research methodology may further help:

• Dey, I. (2005). Qualitative data analysis: A user-friendly guide for social scientists, New York, Routledge.
• Rotchie, J. and Lewis, J. (2003). Qualitative Research Practice: A Guide for Social Science Students and Researchers, London, SAGE Publications Ltd.
• Seidman, I. (2006). Interviewing as qualitative research: A guide for researchers in education and the social sciences, New York, NY, Teachers college press.

• Bordens, K. S. and Abbott, B. B. (2011). Research Design and Methods - A Process Approach, New York, McGraw-Hill.
• Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide Through Qualitative Analysis, London, SAGE Publications Ltd.
• Creswell, J. W. (2007). Qualitative Inquiry & Research Design: Choosing Among Five Approaches, California, Sage Publications, Inc.
• Curwin, J. and Slater, R. (1991). Quantitative Methods for Business Decisions, Tokyo, Japan, Chapman & Hall.
• Goulding, C. (2002). Grounded Theory: A Practical Guide for Management, Business and Market Researchers, California, SAGE Publications Ltd.
• Gray, D. E. (2009). Doing Research in the Real World, London, SAGE Publications Ltd.
• Kumar, R. (2011). Research Methodology - a step-by-step for beginners, California, SAGE Publications Ltd.
• Lee, N. and Lings, I. (2008). Doing Business Research: A Guide To Theory and Practice, London, SAGE Publications Ltd.

I found the following quite insightful.

Lee, N. and Lings, I. (2008). Doing Business Research: A Guide To Theory and Practice, London, SAGE Publications Ltd. - This is a must read

Creswell, J. W. (2003). Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (2nd ed.). London: SAGE Publications Limited.

Denzin & Lincoln (2011) The SAGE handbook of qualitative research. Thousand Oaks :SAGE