[Couper, M. 2008. Designing Effective Web Surveys. New York: Cambridge University Press.10.1017/CBO9780511499371]Search in Google Scholar
[Groves, R.M., F.J. Fowler, Jr., M.P. Couper, J.M. Lepkowski, E. Singer, and R. Tourangeau. 2009. Survey Methodology. Hoboken, NJ: John Wiley & Sons.]Search in Google Scholar
[Tourangeau, R., F. Conrad, and M. Couper. 2013. The Science of Web Surveys. Oxford: Oxford University Press.10.1093/acprof:oso/9780199747047.001.0001]Search in Google Scholar
