Research
Yin, R., Case Study Research : Design and Methods (Applied Social Research Methods) Zikmund, W., Business Research Methods The Handbook of Online Marketing Research: Knowing Your Customer Using the Net Mail and Internet Surveys : The Tailored Design Method
Other Good Research Information Sites: Web Survey Methodology Site Council of American Survey Research Organisations Questionnaire Design and Survey Sampling Information General References on Survey Research Designing a Questionnaire in 12 steps A Guide to On-line Survey Research