Depends a lot what you want. In the following we include both quant and qual approaches, and ethics, philosophy, questionnaire design, etc.

https://uk.sagepub.com/en-gb/eur/research-methods-in-psychology/book257083

Please find a good free textbook that I use:

Bhattacherjee, A. 2012. Social Science Research: Principles, Methods, and Practices. USF Tampa Bay: Florida. http://scholarcommons.usf.edu/cgi/viewcontent.cgi?article=1002&context=oa_textbooks

I prefer a research-specific book for my quantitative inquiry. Tips;

For General-purpose:

1. Research Methods for Business-A skill-building approach-Uma Sekaran & Roger Bougie (Wiley).

2. Business research methods-Alan Bryman & Emma Bell (Oxford University Press).

3. Designing and using organizational surveys-Allan H. Church and Janine Waclawski.

For data analysis purpose:

1. Discovering statistics using SPSS-Andy Field (Sage), you can also consult Julie Pallant's Step by Step SPSS.

Hope this would be of help.

Quantitative Data Analysis: Doing Social Research to Test Ideas (Research Methods for the Social Sciences)

Donald J. Treiman

This is an insightful text, likely helps you with your research. Take a look at it.

Thank you all for your suggestions. I am looking for a reference book on quantitative research methods for one of our required courses, Project Planning & Management at the Kyoto College of Graduate Studies for Informatics. I will check out your recommendations.

Shizuka